I wouldn’t say you’re overreacting, what he’s doing sounds a little like gaslighting (because he says you’re overreacting, but I think many people would find what he’s doing quite aggravating - nobody likes others making out they’re incompetent - so I understand why you get upset) but also controlling? He might be trying to take over because he thinks his way of doing things/opinions on how things should be done are the only ones that matter, or something. Not very respectful, in any case.
I worked on an animation project once where one of the guys was acting like this - too important to answer our questions about a prominent detail we needed to get done that day, so we did it without his input, then he tried to bulldoze what we’d done the next session. He is so lucky he didn’t get put six feet under!