I hate both my parents because they are both extremely selfish, narcissistic and damaging in their own ways.
My father if I can call him that, is a pathetic excuse of a man, physically abusive towards women, sexually abusive too (not against me thank god but against my mother and other women/teenagers!) with schyzophrenic and paranoid tendencies (he made a youtube channel about him being the new Messiah semi recently. So insane and toxic barely begins to cover it) and completely absent as a father.
He would literally fake his own mother's death so he didn't have to come to the controlled meetings with me and my sibling. For the longest time I held onto hope he would change but he is a lost cause and now just waiting for him to get hit by a car drop dead so I can mentally rest knowing he won't cause any more pain to anybody else.
As for my mother, I think she is massively unhappy with the choices she's made (she had me at 17 and then had another 2 kids by 21 and now has 5) and is so resentful she takes it out on us or well disconnect from us everytime we stop filling our purpose. I think she craves love and that's why she had as many children as she does, so she could feel loved and also so the men in her life didn't leave her (it didn't work) so as soon as one of us, children, emotionally rebel or tell her something negative, she writes us of.
I dislike her because she has never put our interests first, life is always about her and her needs, if she does one good thing she will have you thank her for it for life but will never acknowledge all the things she's done wrong or damaged us. I was sexually abused as a kid (and then teenager), she was often sleeping next door or bringing them into the house, she could have known or at least tried to find out why I was becoming so depressed and put the dots together, instead she focused on my weight gain (I was comfort eating) and blamed it all on hormones, when I finally told her what happened she didn't believe me and completely dismissed me as being a liar and drama queen and when she finally found out who did it (family friends) hoping she would show a bit more compassion/care her answer was ''why are you telling me this, they are more friends with your (former) step-dad than me." (implying he had failed me more than she did and it wasn't her problem since it wasn't her side of the family) and went to bed. If she has a small hiccup in her day, she will talk your ear off about it for days on end but if you dare tell her about anything of importance she minimizes it or dismiss it and will never ever acknowledge she was anything short from perfect, if you want her to love you or even acknowledge you, you need to treat her like the mother martyr, queen of motherhood who sacrificed her youth and happiness for her kids, anything else than that and you aren't worth a word from her. I moved out at 16 and she would never so much as text me if I didn't text first (once I didn't text to see if she would text but we only chatted a YEAR later when I had to reach out about something)
I hate my parents because I don't feel either of them ever loved me. They needed me to serve a purpose that adds to the narrative of their life and the role they want to play in it but they never actually cared about being parents and what it implies. I felt I spent most of my childhood trying to find ways to make them love me and hitting a wall again and again and again, and it was infuriating and damaging. I hate them because they are both alive and yet I feel I have been orphaned for years and it makes me so sad that I find the fact that they are alive and not caring much more painful than I would their death.
I think what kids need is love, knowing that you are there for them and that, while you are human and won't always be perfect and do things right, you will always do your best and that they don't have to fight for your love and approval. I am sure they will still find ways to dislike/hate you for a bit but ultimately acknowledging that you aren't perfect and may mess up but love them can make a world of difference imo.