How do I 24m get my mom 52f to stop asking me to call/text her?

I 24m can’t stand talking to my mom 52f. My parents have been divorced since I was 2 months old. Growing up my mom was around half the time. She would have spurts where she was the “perfect” mom and then other times we wouldn’t see her for months. She was abusive mentally and physically. After graduating high school I moved out. Once I moved out I realized how awful she actually was just to be around. Constantly putting me down, anytime I had good news it wasn’t good enough, just living my own life I was doing something wrong. So I quit talking to her. I would talk to her at dinners/holidays that was it. This works for me, I can handle a couple hours of being shit on and I forget about it when I leave. For her however I hate her and I treat her horribly. Since 18 she constantly begs me to talk to her more every 6 months. She wants weekly calls. A couple times I have tried and when she did answered it was a bad time , talk about herself or she wanted to complain about my siblings… my sibling also have this issue with her. None of us care to talk to her. She doesn’t support anyone financially, but yet she wants to scrutinize our choices regularly. Just stupid stuff everything from what we go to college for (business, social work, and HVAC) or when we take a shit. You could say it’s a beautiful day out and she would ask if your stupid. I really stopped caring about her at all when she harassed me into taking summer classes so I could walk at college graduation in the spring so my grandma could attend. She was “dieing” but had been for years (8). Graduation comes, she tells me it’s my fault I didnt get a 5th ticket for her (my stepmom, dad, mom and ?) the 4th ticket went to her bf she had been dating for 5 months… extra tickets weren’t an option… another reason I don’t care to talk to her is because when she gets a new bf 6-12 month she’s a ghost. But as soon as the spark ends she back up my ass. Recently she has been harassing me about not talking to her and I just don’t know what to do at this point. After the graduation crap I just started not caring when I talk to her. I’ll let her go off about whatever she’s mad at me for (I never understood how she finds problem with me when I don’t talk to her or live near her) and I just take it apologize and hang up. In an effort to build our relationship 6 months ago I told her I was gay. She cried and screamed at me then never brought it up again. My dad/stepmom have known for years Have my boyfriend over for holidays the whole 9. She actually found a way to make it about herself and said I did it because I hate her, I am so committed to ruining her life I became gay, have bf and bought a house with him… at this point I don’t know what to do. I don’t need to go no contact because I don’t mind seeing her every once in a while but at the same time I am really tired of the crap with her texting me randomly something nasty or calls that are nasty.