My forever job was ruined by the toxic Director - I was the manager. He would take you into his confidence, praise you for your excellent skills and express such earnest gratitude that you even existed, that you'd be floating along with your own magnificence.
And just as you reached peak self-confidence, he'd smash you down - suddenly being utterly vile and rude and/or trashing an idea or decision or piece of work, totally unprovoked and usually in front of someone else. The subsequent sending to Coventry lasted for a protracted period of time, to the point of falling silent and staring when you walked into the room he was in.
And then it was over and he was all funny and friendly and reliant on your brilliance again, insisting on cosy private chats about how shit everyone else was and how glad he was that you were there, and you'd be so relieved and confused that you'd be taken in and gratefully lap up his attention and the scraps he threw for you. He could make you feel like the most interesting and clever person he'd ever met, you were his right hand person.
But soon your punishment for an unknown crime would come back around, so on it went, round and round, building you up to tear you down. I lasted 3 years and lost count of the number of times I absolutely sobbed driving home. I ended up with zero confidence and it almost ruined me - but I didn't let the fucker beat me, I have a great job now and I know myself.
It's been 8 years since I walked away - I grieved for it like the end of a relationship, I still miss the job itself and what could have been - and he's still there, dishing out the same treatment to the poor bastards who will never have the confidence to leave because they have been conditioned into thinking this is all they're good for.