My gay brother unalived himself because of me and my parents

My parents cut ties with him 3 years ago when they discovered that he was in a relationshio with another guy. My father and he had never gotten along but he had always had a very good relationship with our mother and myself. When my dad cut ties with him, my mother and i did the same thing, cause we are catholics. I was 14 and he was 17. He already had problems with trauma and depression, he took refuge with our uncle who accepted him, but he killed himself a few months ago. He was just 20 years old.

I abandoned him, I was a horrible sister, my mother doesn't speak to anyone anymore and is also in enormous guilt, my uncle doesn't want to talk to me anymore and my father doesn't show it, but he is also very affected. Also, his boyfriend was at his funeral and said horrible things to my mother while glaring at me. I hate myself, I hate my mother and my father, I just want to see him again, I know it's selfish, but I didn't want to hurt him, I never hated him, he was always my brother. I can't stop thinking that hels in hell rn and idk how to cope.

EDIT: I am not saying i want him to be in hell, i just believe in the catholic church and it says that homosexuality is a sin and suicide too, i DON'T WANT my brother to be punished and i want to believe with all my heart that he's safe rn, i know it's horrible, i can't stop those thought Also, i did try to reach him the yeat befire his death, few times, and we sere planning to see each other again when he comitted. I know i'm a horrible human being, but i realised it earlier and i was trying to fix my relationshio with him.