Nobody is asking you to lie. Your previous job and coworkers may suck enough to pull watermelons through a garden hose sideways but the job interview is not about your previous job or coworkers. It's about showcasing how awesome _you_ are and how well _you_ accomplished whatever you managed to accomplish despite the suck. Keep the gripes to yourself even if for no other reason that it takes time away from tooting your own horn in a time limited situation.