What to do?

I’m making this short. This is just events of this weekend nothing more otherwise I’ll be here all day! My brother is absolutely toxic. And he’s only 20.

Called my mom who he yelled at a few weeks ago cussing and all to tell her he’s killing himself (she’s out of town couldn’t do anything she was hysterical)

Made my grandmother and his estranged girlfriend chase him around town.

The house he lives in (grandmother owns) was completely trashed. My mom and grand goes to clean it up finds all sorts of drugs tons of booze and he comes back and tears them a new one and my grand kicks him out. He’s also ran my grand dry and she’s now basically broke because of him. Her fault she ruined him.

He cry’s the next morning upset blah blah they let him back in. My mom says him and his girlfriend need to work things out and be honest with each other. She says she was sleeping with her ex and he says he slept with a ton of women. They leave and come back stay in the yard cussing and fighting. My parents break them up. (Things get fuzzy idk how much I know is true I haven’t spoken to my mom yet) anyways last night he apparently got pissy broke things off with her went and drank god knows what. Was driving around and they found him passed out in a church. Couldn’t wake him up. They honestly should have taken him to the ER but they didn’t and they got him to my moms to spend the night and all he’s doing is crying over that damn girl like it’s the end of the world 😑 they break up every other day. And my grandmother is still defending him and will still enable him and make things worse it’s just awful because he treats them and their property like shit! She baby’s him because “I still see the little blonde headed boy in overalls who didn’t have a dad. Seriously? I lost my dad too!!!! I’m not pissing my life away. I’m not blowing other people’s money. Jesus Christ really? I was three he was 7 months. If anyone should be messed up it’s me because I knew him I remember things. Even so, if he is grieving 20 years later then I’m confused because it’s never bothered him before. I don’t understand why that’s even brought up . It’s not the half of it but I had to rant about this 😑 idk what to even do?