> I’m just really burned out and don’t have the mental energy to come home from a 10 hour day and start preparing for interviews.

Then don't. Show up and put in a fair eight hours, then leave.

You just said one of your options would be waiting to be fired... let them.

Be sure to note to HR or your manager's manager (POLITELY) any issues you're feeling are toxic -- then you can ding them for retaliation if they do fire you, especially if that toxicity touches on a protected class.