So the good news is I think you understand how questing works. You understand filters, and scripting, and how the journal system works. If you can clean some of this stuff up I think you would do great.

• Anything in the validator is a big issue usually. positioncell requires a cell argument.
  • You have player->PositionCell, -49172, -130900, 2344, 180, "(-7,-17)"
  • You don't want grid, you want cell name. "Roth Roryn Region" is a cell name, even if its used multiple times, give it the name of the region if that's where you're positioncelling to.
• I think stylistically the fadein/fadeout thing can be over-abused for sure. the player standing in place while things happen around them isn't normal. for the showcase and the showcase alone it's probably okay
• player->AddItem, "gold_001", 250 = nix the commas, player->AddItem "gold_001" 250
• your getdistance disable checks should be cellchanged checks
• you need an early return in your npc scripts. you're setting tr_map every frame, add a loop right above it thats like if tr_map; return; endif (but in proper format and not semicolons. in the tr scripts this is normally done in the khajiit check which obviously you dont have)
• addtopic is a global operation, not on an npc. don't do this in npc scripts, do this in dialogue.
• You're getting a bit spammy with new topics. A misc should generally have between 1-3 unique topics *at most*, especially when they'll only be used for this single quest. Also Damn Imperials shouldn't have a capitalized D
• Romil Arendas has been robbed is kind of specific of a topic, as before try to reduce # of topics in general. if TR has 1000 quests we can't have 7000 topics lol
• Legion should always be capitalized when referring to the Imperial Legion; Imperial (and races in general) should be capitalized
• Choices typically end with periods (ie Nevermind.)
• journal entry 25 references they didn't have anything valuable on them, but triggers ondeath. not sure how the player would know. I would make it an activate trigger when you attempt to loot them, or something.
• If you pick up the shield before the quest, Romil steals the shield immediately which is very bad quest form. Instead, have the same quest filters but make it a choice where you can be like "oh you mean this shield?" or choose to not turn it in immediately. On that note I'm not sure why he would be so pissed you got his shield back. Certainly he knows you didn't rob him.
• reduce.... the ellipses... just a bit.
• Ohhh... what am I going to do. -> end with question mark
• As promised this is all the gold I have. as promised, comma (make sure your grammar is spot on)

Still some issues I need covered.

• Sujamma (and other liquors) shouldn't be capitalized. Legion in the latest rumors topic still isn't capitalized. Imperial in the journal isn't capitalized. The quest name isn't capitalized. The shield name isn't capitalized. These are easy typos to spot, and this is not a complete list.
• If you hire the bandits and turn around and talk to Giarnu, you immediately complete the quest. He shouldn't give you the shield, either. Have the npcs say good job, and let the player loot it.
• Do not teleport the player. You can fade out to make the guard disappear - sure. I forgot to mention this last time. Your script is complex enough, just remove the positioncell part from the player.
• The topic "from the fortress" is broken for the guard. The line starting "About time!" that triggers the quest has a filter Journal < 30 which means you don't even get the first choice option.
• The quest lacks direction. I get the latest rumor but it doesn't tell you where the quest starts. South of town? East of town? In the closest Imperial fort? I think the rumor should probably point to Romil, if anything.
• Giarnu's friend points you to him, but Giarnu has nothing to say before the quest starts. Keep every quest state in mind. For your showcase this is... acceptable, but in a real quest this can be a flaw. An npc that's pointed to should lead you in the right direction.
• The bandits 2nd choice "Nevermind" doesn't seem like it permanently locks you out, but it does. If that's the case (ie, you only want the two bandits to offer to help once ever), nevermind should be changed to something more permanent sounding.
• Keep quest logic out of greeting 5 as much as you can. Again, for your showcase, this is probably fine. I would have given Giarmu another unique line post-quest as well.
• Ironically you went too far with removing ellipses lol. " I, I don't know if I can ever repay you. That shield. It's everything to me. here take this" (capitalization error, too). This line in particular, if you wanted this format you would say "I... I don't know if I can ever repay you. That shield is everything to me." But I would probably change this in review to just say "I don't know if I can ever repay you" etc.
• If you give Romil the shield early and click "drown the shame" he still hates you afterwards and says "get away from me"

You need to be careful in the future and avoid sloppy mistakes. You fixed everything in the validator which is great, please review the dialogue and fix the major quest errors.

Practice makes perfect, and I think you can get there eventually.

Bugs

• Sujamma, flin, mazte etc are considered generic nouns like beer or wine.
  • The way I remember any noun's capitalization is by using the text search function in the CS to see what the vanilla game does.
• What I meant about heirloom shield capitalization is that the item name has to be capitalized. When talking about it, it's just "Thank you again for recovering my heirloom shield. Thank you." The item itself that you pick up has every word capitalized in its name.
• The line you wrote was "Thank you again. For recovering my Heirloom Shield. Thank you."
  • "For recovering my heirloom shield" isn't a complete sentence.
• Instead of duplicating lines for each end condition, just add a filter journal >= 45
• The choice response "You got it back?! Thank you so much! I don't know if I can ever repay you. Here take this. It's all I have." has no NPC condition.
•     Choices "I got your shield back" 1 "Nevermind" 2 need periods after each one.
  •  This was mentioned previously
• The bandits still follow you after the quest is done

General tips

• You want to build your topic responses from the top down - the top condition should be the latest entry / last journal response. In the 'robbed merchant' topic you go in reverse. [You can change the order of responses with left and right arrow keys btw]
  • This makes it a lot easier to do something like the above, where you say anything >= journal 10 will have response X, which gets overridden by another line if they have a line with >= journal 30
• Getdeadcount should always check >0 instead of == 1. Weird script thing, I know.
• Don't use same faction (or same race), just use the PC Faction filter on the bottom left.
  • Race filter doesn't really make sense for this one

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I think what you have is good, on one condition - that you describe how you would fix the bandits from following you after the quest is done. Either provide a short code snippet or describe where you would insert a function to fix the bug. No need to update the esp and repost it.

If you can do that, and it works, you will get the badge.