I believe Bannon’s days were numbered once Kelly became chief of staff. It wasn’t a matter of politics, either. Kelly was brought in to institute a much-needed rigid hierarchy in the White House, and that was completely alien to Bannon’s personality. Kelly might be the best White House Chief of Staff in history, but a fabulously wealthy and successful man like Bannon has no interest in answering to someone who has spent his career in the military and then as a civil servant.
What's being reported backs you up.
Bannon wasn't really happy in the WH, and it was clear to the objective among us that he wasn't really West Wing material.
He needs to start a new network or something...oh wait.