@Rainbow03 I think it's really important to understand the level of disordered thinking.
Let me give you a real world example. exBIL is still very angry and very upset with me (and, to a lesser extent, DH) because of what he perceives as our unwillingness to help. He claims that he asked for help and we did not give it. He is very bitter and very resentful about this. It's not 100% clear what is that he expected from this help that he supposedly asked for, but I think it's safe to say that he feels if we had helped, perhaps they would have stayed together. He is not making this up. He is not intentionally lying when he complains to me, to dh, to SIL, to PIL and, probably, to everyone else, that SIL's family, me especially, were unhelpful (also toxic and abusive). He 100% truly believes this.
However, here are the facts:
1 he didn't ever ask for help as you and I would see help. There were a few occasions - two in particular I can think of - where he contacted me and DH and "asked" for something. However, in both cases, the help he was asking for basically came in the form of a long stream of accusations about SIL and how toxic/abusive/crazy/manipulative she was. One one occasion, after all of this and lots of comments like, "she does my head in", he asked me to ask DH to take her out for the evening so that he "could get a break." This was particularly ironic as at that point in the relationship, SIL was barely leaving the house as he made such a fuss. Her and DH had been to an event together a few weeks before and he'd sulked for 3 days.
2 At no point in any of these streams of consciousness, did he ever acknowledge that he might not be 100% perfect. They were all about her. He didn't even make the sort of semi-acknowledgement like, "I know I'm not perfect but...."
3 The accusations he made about her were either blatantly untrue or were completely unfair and were based on his own perceptions. for example, when they had a newborn, he constantly complained to DH that she didn't make enough time for HIM and that she was unreasonable for wanting him to do more around the house because he was also a new parent and needed more support from her. DH pointed out that with a newborn no one is getting much sleep, everyone is struggling and that as she was BF, it was his job to make the effort.