Help Nugget get healthy

I have been in the process of moving and I came home this morning to find my 6 month old kitten under a dresser hiding and not letting anyone touch him. When I picked him up he screamed and couldn’t walk, come to find out my roomates boyfriend had hit and kicked him, locked him in the toilet bowl, and held him upside down by his tail. We rushed nugget to the emergency room and he has brain damage and will now have a hard time walking, he has a bleeding hemorrhage on his kidney caused from internal bleeding from being kicked, clots in his bladder, and he is currently in an oxygen tank. My heart is absolutely broken for him and I just want my baby to be okay and to stop animal cruelty, I think it’s ridiculous I am having to make this but this is what it has come to. Any support in any way will help, thank you so much.