Here's my partial theory of what happened with Corsi and AJ.
Whatever AJ is, controlled op or not, he screwed up BIGLY the night he went off on POTUS, Mattis, and Dunford….oh NO!
The next day Corsi was asked about it on PSB and he basically defended Alex.
That sealed it for both of them.
Add to that this Zach character and his shady past and AJ trying to hijack the Q movement through "his" Q.
Q Patriots, imho, said enough is enough with that fiasco.