Is it normal that i don't want to talk to my mother anymore?

I'm 22 y.o. and live alone but keep in touch with my mom. Few weeks ago we were supposed to meet in cafe and celebrate successful ending of my probation period at work. Evening before we were supposed to meet i read my old child diary (out of boredom) and got really upset. My childhood was not that perfect, and in my diary i described not pleasant things my family did to me. So i called her to cancel our meeting because i knew i wouldn't be in the mood. She asked why, i said nothing. She kept asking and i said that i read my diary and got upset because of the things she and others done to me. She called me ungrateful and hanged up the phone. And so i don't want to talk to her anymore.

That brought up memories and more. Most outraging part is that people trying to make me feel guilty for the bad things they done to me. Back in old days my grandmother would piss me off, piss off the whole family because she had a disease that affected her judging, and so we often had a heated argument, and sometimes she threat to call my uncle, who hated me, verbally humiliated me and once hit me with a fist. It was not physically violent most of the time but it was close to and i was really scared each time. My mom did nothing about it, she just watched. I was young and stupid and we had a dog. Not big, but the one that can be deadly. Dog beat me few times to blood (it was my fault i agree, but a fault of 11-13 y.o), and once beat me so hard i still have a big ugly scar on my lip. Family did nothing about it. She herself would shout at me when not in the mood, yelling "shut up" for no reason. Once when at the table i said something and i was really young. She and my uncle yelled "shut up" at me, then stared at each other and started laughing.

For some reason things changed when i started living alone, it looks like she changed her attitude, but i feel like it's too late. I think it's because of my childhood (school was involved too btw) i am unable to love, to have friends, i can't trust anyone. And then, when i remembered it and just got upset and told her about it she called me ungrateful and hanged up the phone. Don't i at least have a right to get upset when remembering of my past? Don't i have a right to remember my past? And most importantly - do i have to maintain relationships with someone just because it's my parent? So please tell me, are my thoughts normal for this kind of situation?