He was very annoyed about being called controlling
I dated a guy who stated "no, I'm not controlling".
He, from three months in, didn't want us to ever socialise separately.
Since I wouldn't agree to no separate socialising, he wanted me to tell him in advance if I was going to socialise.
If I didn't tell him beforehand that I was going to socialise (which I also didn't agree to) he would accuse me of being deceitful and tell me the trust was broken & the relationship was over (but not actually end it).
He made comments on my clothing - actually what I said I'd worn (because he wasn't there to see it). For example me saying that I must have put on some weight - because my usual long witch costume dress was now too tight - became "aye and you wore a short, tight dress!".
He told he I was acting like a single girl if I socialised separately.
If I mentioned speaking to a male ex colleague I bumped into in the street, he would criticise me for it afterward.
If I spoke to a married man I was vaguely acquainted with, while both of us standing beside him, he would criticise me for it afterwards.
When I said I used to visit a gay male friend abroad occasionally, he informed me that "that wouldn't be happening with me!".
On the two occasions I left my phone behind accidentally at his home, he went through every message with a fine tooth comb, even opening phone company standard bleugh messages because I hadn't bothered opening them and he just saw them as new messages.
He told me he had no problems whatsoever with his exes socialising separately, but then let it slip several times that he most definitely had. For example, while carried away recounting the end of a previous relationship, he said "and I told her "I don't go out with women who hang out at pick up joints like (bar in our town)".
He was intensely uncomfortable with any sexual contact I'd had outside marriage or an LTR leading to marriage.... In spite of the fact he'd had that himself. I felt like I was continually being asked to explain and justify why I'd had it. Something he didn't feel the need to do about his own experiences.
This is all off the top of my head, there's plenty more;
My point is that he sat with a straight face and earnest, convinced manner claiming "I'm not controlling!".
The closest he came to admitting it was - when I said the relationship would end if he didn't stop the behaviour - and he said it was "hard" (to stop thinking and acting like that).
Apparently too hard, because he was still doing it when I ended the relationship.
The day an abuser says "I'm abusive"; I'll presume they're being given a million quid for doing it.
You can't change values.
You can't change someone being dumb either.