In a nutshell, as concise as I can muster it:

Drew didn't like Rust very much, and criticized it a lot for it's complexity. He is also a very vocal supporter of open-source, going so far as to disable NVIDIA's non-free driver support in his wayland window manager/compositor Sway.

On top of that, he made SourceHut, an alternative to GitHub/Gitlab and some other innovative projects, like Gemini.

EDIT: Drew did not make Gemini, but he is still one of it's most vocal promoters. /EDIT

Recently, he even disclosed a new systems language, much simpler than Rust and more flexible than Golang.

Suffice to say, he's made some enemies that don't want him and his team to succeed.