I feel you. I had an abusive boss for 14 years. Finally got rid of him. Got a new boss and for like the first 3 years he had utter respect for me. If I said, let's blow up the world, he would say, ok. (but I wouldn't do it).

6 years in, I have been squeezed out... and he has obvious contempt for me.

He doesn't like me as a person and he doesn't respect anything I say anymore.

I do believe he has been poisoned by others. Negative influences who have made him see me as not a "co worker" but an employee.

Recently someone asked him a question and he said -- "X" should happen. Not only did I know that was wrong, it would have made more work for me. So I found out the right way to do it and told him. He said ok let's do it that way. Followed by an e-mail to everyone to say

"JUST FOR THE RECORD" -- though this time someone said to do this... every other time it should be done this way. (when that is not true at all)

So he had to assert his authority because I made him look stupid I guess. But I would have rather made him look stupid internally rather than for us to do the wrong thing and have us look stupid in public.

He constantly keeps giving me extra work -- though he knows I am already busy -- imho because if I am too overwhelmed with work I won't be able to find the right way to do something and contradict him.

I have put in for other jobs. I might even take a demotion. I can't deal with this any longer. Since I get amazing reviews (even from my 14 year long abusive boss) I feel I am just too advanced for the position and the bosses have to keep -- pushing back at me -- to maintain their supremacy. The truth is, my boss isn't even as accomplished as I am. I am happy to continue to use my smarts to make him look better but he clearly doesn't want that. He clearly wants me to just do what he says. No matter how stupid.