what would you do if you really hate your boss?

i have two bosses at work and since iam just a trainee the one i had a very big clash with will write my evaluation,i still don't like neither her or the other and i don't want to be a hypocrate and act like we are ok, as i don't like them,they are very coacky and they always talk behind people's back ,i heard them do that once infront of me and enjoying it ! pray for me and tell me what to do!