Multimc devs refuse to let anyone else compile/provide packaging scripts for their application. Their own Linux packages installs into /home and can't be cleanly uninstalled. They also deliberately broke the compile process by removing key files from their git repo. When confronted about it, they decided to threaten to sue the AUR maintainer for trademark infringement on their discord instead.

So alongside the part about mulitimc that StarDreamer said regarding the AUR and packaging attacks.

After the fork to PolyMC the maintainer of PolyMC decided to make it political. He was trying his best to prevent a specific clarification to an inclusivity clause in its contributors guidelines or whatever it's called. (From "everyone" to something along the lines of "everyone, regardless of race, gender, sexual orientation and preference") A huge argument broke out, and he went full right wing and just kicked all the opposing people off the project, spitting right wing "wokeism" rhetoric the whole time.

People realised what was happening and left the project for prism launcher with a new maintainer who had been kicked as a result of the maintainers rampage and need to make it intensely political over what was essentially a minor issue: wether or not to clarify the word "everyone"

As someone who was watching from the sidelines, It really was a circus in both the mulitimc and the PolyMC cases.