The people that need to "win" drive me crazy. It's not enough to them if you concede on some points, it's not enough if you agree to disagree, they just have to be right 100%, and you realize they won't be happy unless you say "Sorry, I was wrong and you were right." and bow to their superior intelligence.
I've made the mistake of engaging with people like this before and it was a nightmare. Like you said, they wouldn't just drop it, even after I explicitly said "Sorry, but we are going in circles here, we should just end it." after an hour long discussion, where they could've easily taken their "W" from me walking away.
Honestly, my only thought right now is "?"
I don't understand this, do you think I'm someone else from here that's using an alt? Because if you do, I'm not, you got it wrong.
I do avoid some conversations IRL because I know they will get ugly and me giving my opinion isn't necessary or important. There's a saying in my country about never discussing politics or religion. Seeing how some people can get when you disagree with them, I've found it wise to follow it.