Completely ignore them.. don't let what they say get to you. My manager is a nice woman, but during work she can turn into a complete lunatic. 2 weeks ago she singled me out and screamed at me infront of everyone, over a minimal mistake which was my first in 6 months of working there. I was ready to quit, but I have to stay for the same reasons as you. Now, I can't really stay angry.. at anyone.. so this all passed pretty quickly, and now we're on good terms again.
I know my situation isn't the same as yours but I hope I can help. Really, really try when at work to just ignore ANYTHING negative. If something pops up, immediately change your thoughts. Just try and think positive as much as possible, find something to distract you're mind. You CAN ignore them, stop telling yourself you can't, thats part of the problem. Mind over matter. Just know that you live a beautiful life, and your manager can enjoy their power trip for now, but a few years down the road just know they'll be a sad, mean old man, whereas you have you're whole life in front of you. This job is nothing but a stepping stone for something greater, think of it as that. While you're there think about anything but the job, distract yourself. Go there, do your job, go home, ignore anyone you deem worthy of ignoring and
And/or smoking weed also helps.