Kayanogal - I'm addressing this specifically to you because I fell into an abusive relationship with someone who also had low self esteem and a crap childhood with crap parents etc. - and because you seem to be still thinking that it partially excused the way he was (it's just the way you wrote it, you look like you feel it wasn't entirely his fault). With my ex, it made me put up with so much more shit than I probably would have from anyone else - and it's such a mistake. Not all people who have shitty childhoods turn into abusers, not all of them decide that everyone else needs to be brought down to size the way they were - and I used to mentally tie myself into knots to find excuses and alternative reasons as to why the bastard was so mean/abusive to me.
In the end though, it didn't matter WHY he did it - what mattered was that he DID it and thought it was ok to do it - that he could just dish out the pain that he had received in some kind of payback. It's a shit attitude and shows a major lack of empathy. My ex was also a pathological liar - almost every word out of his mouth was a lie, I came to realise that it was his automatic response to lie, he actually had to think before he told the truth! He didn't care if he was caught out in a lie either, would just fabricate another load of shit around it to try and confuse (gaslighting to some extent but so complicated!)
I suppose my point is - please stop thinking he ever had an excuse for it - he didn't, not really.
Complexo - your ex was a shit and an abuser, yes. And to answer your question, I think that most abusers will attempt to abuse anyone they're with but it's possible that there are some men who are not abusers as such, but marry the wrong person and then stay with them out of misguided loyalty but get so frustrated with them that they behave abusively, where if they were with someone else, they might not. Difficult to know but (and this is pure speculation on my part) I would think that the earlier and more classic the abuse is, the less likely it is that the person would ever be any different; if the abuse only started after many years together, then maybe it's situational rather than character (STILL doesn't make it right though OR excuse it).