<human>: Can you succinctly summarize the text in 1-3 sentences?

I'm a 20 year old dude. My parents had a messy divorce when i was 9 and it spilled over many years: social services, court orders and everything were involved, both parents used myself and my younger brother as weapons against the other, telling us that the other was something horrible to try and get us to stay with them or stop contact with the other. 
My mum would always insist that it was my dad fault i had self-esteem issues yet it was complete bullshit.

After the divorce, my dad found a new job, bought a new house, found new hobbies, made new friends, found his new wife (who's lovely), had two children with her and generally got on with his life.

My mum on the other hand: dragged me and my brother with her, rented a shit house, kept her alcoholic abusive boyfriend who she left my dad for and had another child with her boyfriend (he left soon after).

She now just wallows in self pity, she has no friends or a partner, no interests or hobbies and is overweight, she sits and complains about all of those problems and never tries to fix them yet she has the nerve to criticize me on how i'm living my life (i'm 20 and at university, my life is going fine in my eyes).
I have absolutely no respect for her and am starting to despise her because of it.

I just don't know what to do, i can't help her as she's unwilling to even help herself and i am fucking fed up of the constant complaints.
I'm considering cutting contact completely from her. 

Could i get some advice?
<bot>: Parents divorced, dad picked himself up and leads a good life, mum fucked up big time and complains about life but never fixes hers, criticizes my life instead. Want to cut contact with her.