Why do moms throw in your face they birthed you and did the bare minimum

My mom got mad because I snapped on her. We don't have a good relationship. She loves to throw in my face that did carried me and took care of me and I hate that. Children don't ask to be here. You open those legs and get knocked up. I had when parents do that manipulative stuff and my mom pulled that shit again and I snapped. I said " Yeah. You opened those legs of yours and let my dad cum inside you. That's your fault. You fed me and clothed me. If you didn't that's child abuse and you go to jail for that. You also forced me to go to church every Sunday. Even after finding out the pastor was sexually abusing me and made me forgive him and be around him every Sunday. But hey. You took care of a child you made. Bitch want a fucking cookie." I have borderline personality disorder. I'm not using that as an excuse but she has been pushing me and pushing me all week. Then she seriously goes "Well I guess I'm the worst mom!" I hate that. Why do parents do this. Throw things they either chose to do, like have a baby because they spread their legs, or have to do... Like take care of their children. Why do they throw that in their kids face. We don't ask to be here. And they act like doing the bare minimum erases all the bullshit they put you through. I literally got pregnant at 13 by my pastor. I miscarried thank God but she was gonna force me to have that baby and raise it as my sibling. But her buying me a coat in the winter makes up for that. Her little 35 hours of labor that happened because she opened her legs and I didn't ask to be here makes up for that. Be fucking for real