Fighting for full custody of my brother Update

My brother absolutely hates me right now because I'm trying to take him away from my mom but my mom has been severely exploiting him online for the last year. He's 12 years old and on tiktok but he's under my moms account so that he can be on there. He's talked about being a rapper one day so he makes music but my mom has exploited the fuck out of him. She lets him post pictures online of smoking weed. He's not in school. She's constantly letting him hang out with grown adults by himself and he's posted pictures of kissing a grown woman on his Instagram. My mom has made money off of him for a year and I've been collecting evidence of this. She's not protecting him from predators at all. He's posting inappropriate things on both social media and tiktok. Idc what peoples opinions on weed are, a 12 year old should not be recreationally smoking weed and drinking alcohol and posting it. This boy is 12 and can barely read. She allows him to post sexual stuff online and some sexual stuff or "jokes" are made with grown people who are wanna be influencers. My mom is bringing in money off of him so she does not care. We have another court case coming up. She's already under investigation by CPS and if I win I know my brother will hate me but I'm doing this for his own good. He's getting back in school. He's getting into therapy and honestly I may make him delete his social media. I know I'm gonna be the villain. It just feels like I have to be the villain to help him.

Update: This morning the court awarded me primary custody of my brother. My mom will get visitation once a week and in this agreement she cannot make ANY content with my brother to put online. We aren't really done with court just yet because I'm trying to get all funds made under my brother's name put in an account for him that she cannot access. He's obviously very upset with me. Not just for the stuff with mom but feels like I'm ruining his career because I said no social media anymore. At least for right now. I just want him to be able to live a normal childhood and get back into school. Learn to READ. Not be exploited to predators. Hopefully he will understand one day.