feeling guilty for breaking up

I recently broke up with my girlfriend of 8 months because she would too often get mad at trivial things. that would often turn into an argument and she would start to yell, and if I defended myself long enough she would walk away/get out of the car and leave the scene, which frustrated me because she stops the conversation short the last argument was so stupid it's unbelievable. she wanted to wash my car because she said she loves washing cars in those self-help car washes. She foamed up the car and I noticed she's cleaning the tires along with the rest of the car, so I told her it's better to leave the tires for last because they will dirt up everything. she said not to tell her how to do it, if I want to do it better I'll have to do it myself, and I just said I'm not complaining, just giving her an advice, I don't mind really, just thought I might help her with an advice, and she left the car brush on the car, leaving it all foamed up and sat on a nearby wall. I walked up to her and sat beside her and told her I didn't mean anything bad, just an advice, and she still said she won't wash anymore, so I went to wash it off with water. now she wanted to wash it and I told her no I'll do it, because she said she won't do it anymore. she got upset, told me I'm treating her bad, rude, and told me to take her to a club where'd she go alone. I got frustrated, that was just another pointless argument where she wants to be alone and ruin our night together, things piled up to be from before and I said I can't take it anymore and that we should split up. Now I feel guilty thinking I ruined something good we had over my inability to stand pointless fights, or deal with them better, and I'm thinking about contacting her again and try to fix things, but we had a bit of off-and on before because of the same reasons, talked about it but nothing changed really. I just can't seem to handle pointless arguments and her leaving the scene instead of reasonably communicating, she just throws a fit... But now I'm not sure is it all my fault, should I have been able to stand those things and just take it... the root of all those arguments, it appears, is her insecurity, for example if I were to hang out with friends, I care for friends more than her, if I'm doing something online she feels like I'm ignoring her and like doing stuff online more than chatting with her, if I'm doing anything that doesn't include her and she has to wait for my attention, I don't love her, that's how she thinks

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