I think this means that CNN and everyone is catching on to his schtick. He is not doing it for CNN. He is not doing it for "the resistance". Acosta does what he does strictly for himself and his own gratification, and nothing else. He has no real goal in mind other than relieving his own petty frustrations. And he is using CNN as a platform for his own personal interests. I doubt any employer, even CNN, would tolerate that.
Acosta's job is to work for and promote CNN. When Acosta becomes more important to Acosta than CNN is, an adjustment of some kind may be necessary.