When you've had enough, can't tolerate your job any longer and are ready to quit, perhaps you could try one last thing.
You've got nothing to lose, right? I mean, you're going to quit anyway, so what's the worst that could happen to you?
So quilt. Spend hours every day integrating the people you work with into a cohesive group. Weave in your customers as well. Take every scrap, even the people you don't like, and sew them together. Spend far less time than you should on the 'real' work and instead focus on creating genuine connections with the people you work with. Including your boss. After all, once you quit, you're never going to see them again anyway, right? Might as well give it a try.
Careful… it might change everything.