Great, so...Bull's now a rapist? *shakes her head*
Okay, well, people are reading way too much into this game, because apparently, everyone's a freaking rapist (or will be called one by someone eventually/have it implied that what they did could be considered rape) for one insane reason or another. Dorian may have been drunk at the time, but he clearly wasn't comatose or impaired to the point of losing control of his mental faculties. There's a difference between having your inhibitions lowered somewhat (and maybe making a bad decision) if you've had a lot to drink versus being an unwilling victim who is intentionally drugged/made drunk to the point of passing out by some creep whose goal actually is to rape someone.
When people claim loss of control and inability to consent, that usually seems to involve being so drunk that you've passed the hell out - probably from either imbibing a huge amount of alcohol or from actually being drugged by some would-be rapist as stated above (yes, I feel a need to reiterate the point already). These are two guys who drink fairly regularly, and they seem mostly capable of holding their liquor.
Now Dorian might not have used the best judgment while under some level of influence from the alcohol, but if he had really hated the experience or truly regretted it, he wouldn't have entered into a relationship with Bull. And it's perfectly valid to bring up Cole, because Cole knows everything that goes on with everyone - and if anyone were truly unhappy or hurting for whatever reason (like being in a hypothetically abusive relationship), then I am quite sure that Captain Compassion would have brought it up.
Maybe they have a Moonlighting-style relationship a la David and Maddie (if anyone younger than I am is actually familiar with that show) where they semi-hated each other but were also attracted to each other and ended up hooking up eventually. Sure, the Bull-Dorian relationship might have a more teasing/antagonistic/whatever aspects to it, but that doesn't make it abusive, and I'm pretty sure that Bull isn't suddenly a rapist just because their dialogue might be on the prickly side, as opposed to being all sappy, lovey-dovey crap. Maybe their thing is just sarcasm/snark/whatever - sheesh.