I'm going to try to ignore my very ill mother
Why do you want to ignore your mother, especially when she's sick?
I hate listening to her cry and I wish she would go to a better place.
I see how that can be traumatic and you don't want to see her like that, but what she needs the most is you. It's very harmful and rude to ignore her as she thinks you hate her when that's not true. You need to be nicer instead and stay with her until she gets to that better place.
All she does is cry and I can't take it anymore.
It can be hard to be around someone you love when they're sick. But remember that it's even harder to be her. It's best to be kind and attentive to a sick family member or you're likely to regret it later.