I don't have a good answer for you. A lot of people have left to much better environments and yet a subset stick around painfully aware of how bad it is. It doesn't make sense. Though my understanding of the psychology of toxic environments is that the longer you're in them, the more you normalise them. Lot of Stockholm Syndrome going on there. Lot of people claiming "of it's not that bad" and then tip toeing around all day while being micromanaged.