Three of my romantic relationships that ended in the past few years did so because I gave the person I was dating (who turned out to be rather P/A) what they wanted.
In each case, we were having a disagreement about something that I thought was serious, but not relationship-threatening. For example, one was a case of a miscommunication: he thought I was calling him to set up where we'd meet, I thought he was calling me. When I didn't call him, instead of calling me to find out what happened, he decided that I'd stood him up. At any rate, because he was upset that I stood him up, he sent me a text, telling me that he wanted to return the stuff that I'd left at his place (toothbrush, pjs). I was confused, both at the hostility, & why we went from meeting up to breaking up. But I went along with it & made arrangements to get my stuff.
Then we talked about it, & I found out that he was returning my stuff/breaking up with me because he thought I stood him up. Mind you, we've been dating for four months at this point, I'd *never* stood him up, and the only time I ever cancelled was when I was sick. But he'd had previous girlfriends stand him up, so he had a rather...drastic reaction to thinking he was being stood up.
Once we figured out what had happened, he wanted to keep dating. It turns out, he was breaking up with me to teach me a lesson about how seriously he feels about being stood up. But he hadn't actually expected me to "accept" the breakup.
Sorry dude, if your idea of how to handle things is to use breaking up with me as a weapon, then we shouldn't be dating.
And this has happened three times in the past few years. It's a really disheartening trend.