Purely my speculation, but I think she was given a "We will let you leave so we don't have to fire you" deal. People in the VFX industry despised her. The Disney+ shows are getting mixed (at best) reactions. The animation division has had a ton of issues since she took over.
She also was very vocal that the X-Men needed to be renamed because it was sexist. She harped on this a lot.
Well, in that case, good riddance. Their CGI has not been close to as good as it should be. I honestly haven't had too much of an issue with most of the D+ shows. But their CGI and VFX have been below par imo.
And lmao. Leave the X-men name alone. Weird hill for her to go to battle on, but hey, we all have issues.