I know the conventional wisdom is to wait it out and force the company to pay you in severance. But, they'll try to deny it to you by every means they have. You just have to ask yourself one question. Is it worth it?
You'll be faced with a ticking clock of the severance checks stopping while you job hunt. No getting away from that.
Just start looking now and taking interviews with sick days or doctor's appointments and then just...leave. No two weeks' notice. No exit interview. Just tell them you quit and walk out. You don't owe them anything at all.
You'll feel great! You'll be leaving this lousy job and starting new one. No better feeling in the world. Better than waiting around in the stress test lab wondering when your number is up.
They are actively trying to exploit you in every conceivable way.
Just. Leave. Now.