Yeah, sorry, I did see you were using she/her pronouns that is my bad. Thank you for the clarification regarding you being trans accepting, I'm glad to hear it and I appreciate it.
The shadman part is gross, but also quite a while ago and I know how edgy the Internet was back then. It seems tacked on to make her out to be a pedophile, which is a stretch. I remember that I heard about Shadman due to the same edgelords promoting him and showing off how edgy they are. It was basically a meme. Shadman by all means is a disgusting piece of shit who deserves jail, and it is gross that Ava would support that artist financially given they always displayed that they are a literal Nazi.
It does sound like the Discord part of this should be bigger than Ava, in particular the discord being sexually explicit. I don't really see why her penis being mentioned makes her the problem here, Mr Beast and those other users were the ones talking about it. It seems like the whole discord was bad. There was also some casual racism in the whole black person and penis size thing. Nasty. I would also go so far as to say that the non-public aspect of Discord and it's prevalence among gamers (who obviously skew young) is a part of the problem here, and Discord bears part of the responsibility for enabling this. They could have easily seen that they allowed minors and discussed sex and shut it all down, but likely due to their bottom line they didn't. Why aren't people outraged at Discord for not doing basic keyword detection for minor-facing communities? It seems the entire MrBeast crew/affiliates, including Ava, and Discord are responsible for this.
This doesn't effect cis people as strongly as it does us. I've seen people caution against this because they might assume their reaction and your reaction would be the same. You might end up reinforcing that misgendering is okay.