The ex I was with pre DH - horrible breakup, I was convinced he was The One, but he wasn't ready to commit. I was so into him and clearly rather blind to some major character defects.
A few years ago, he got back in touch with a whole spiel about how he'd never stopped thinking about me and regretted our breakup every day since it happened. I was momentarily hooked by this trip down "what if" memory lane, and met him for coffee. Although he's retained good looks and surface level charm, I soon realised what an absolute arrogant arse he was and what a bullet I'd dodged. He spoke horribly about his wife, and clearly mainly married her for her looks and family money/connections to help his business, doesn't love her or respect her and frequently picks up other women (propositioned me for a grubby little affair too). He bragged about having confrontations with people at work, on the roads, etc and prided himself on "giving people what for". Runs his own business and looks down on people who are "dependent on others for a living". He lives in a country where domestic staff are the norm if you're middle class and the way he spoke about them gave me the ick. Zero awareness of white privilege and the undertones of casual racism in what he was saying. He also called his autistic niece, age 9, a little sociopath. He has this veneer of being a good person, involved in charity work, gives lots of financial help to his family, but it's such an act. I couldn't wait to get away from him.
I really don't remember him being that awful when we dated when we were young. Ambitious, yes, and a tendency towards being more confrontational than I was comfortable with at times, but not outright horrible in the way he came across when we met again. He claims that emigrating has changed him, he hates where he's living, regrets his marriage, feels trapped, etc. But everyone else seems to be to blame other than him, he takes no responsibility. He claims if he'd had the guts to propose to me back then instead of running away abroad it would all have been different, but I don't think it would have been, I think we'd have divorced very quickly, and it would have been a high conflict divorce too.
The universe definitely looked after me there!