Did you by any chance get to complete some kind of group evaluation? A lot of my projects involved one of those and sometimes, I was brutally honest.

If not, think of it this way. If the members of your "group" (and I use that term loosely) are in your major, you now have a good idea who you DO NOT / WILL NOT work with again.

Talk to the prof anyway, he/she may do nothing, but on the other hand, they may be sympathetic, and at least you know you tried. You'll always wonder if you don't.