OP, I encourage you to finish it and pay attention to the accolade. I didn't like the mission myself until I saw the accolade title. It puts the entire thing in perspective from a Trek point of view. You may have to resist every time until you have no other choice to get the accolade. I can't be sure about that part, but that's how I played the episode.
The fact that the mission made people uncomfortable suggests that it was a complete success, and that the designers should feel proud that they've managed to provoke an emotional response in an MMO.
I couldn't have put it better myself, this mission was the first mission I've ever played in an MMO which provoked such a visceral reaction. I hate it it, I hated what I was doing and I hated why I was doing it - that's what makes it such a brilliant piece of storytelling.
I can sympathise with the OP - you've seen some things in your life that nobody should have to witness, but I don't think that means that Cryptic have made a mistake or are doing something they shouldn't because of it. You have my genuine sympathy, but I really hope they don't change a single thing about this mission. For me, it's up there with "Chain Of Command" and "In The Pale Moonlight" with absolutely fantastic pieces of uncomfortable storylines. Brilliantly written and very emotional, so I take my hat off to the writes on this one.
I would also recommend you skip it when LoR goes live - given how uncomfortable it made you the first time when you couldn't finish it.