I think Bannon left willingly. Similar to Roger Stone way back in 2015, Bannon was "fired" wink wink, nudge nudge so he run an outside shadow campaign. Christie I think was just a swamp rat who was useless. Bolton was let in to try to calm some of the Deep State into thinking Trump wasn't going to purge the lot, and he had some uses (e.g. he can run interference at the UN, which he knows well).That above may all be true, however axing Steve Bannon and Chris Christie, whilst hiring neocon shills such as John Bolton have hamstrung the America First movement. Trump is just a vessel/messenger, and failing to keep America First nationalists in his inner circle is poor management.
Edited to add* Bill Barr has been an excellent addition, whom I believe is the closest ally within the administration..., but his treatment of Jeff Sessions and endorsement of Tommy Victorville is full on vindictive and childish behavior.
Vox Day, who is a very smart man whose opinions I often agree with, thinks that this entire scenario (the coup impeachment, the riots, the pandemic) is all part of Q's "storm"prediction.
Basically, according to Vox, the Deep State + Globalists know Trump is about to unleash a huge wave against them, and the impeachment coup, the riots and pandemic are their attempt to stop him or slow him down and hopefully spark an actual coup against him. You'll note how everything has escalated against Trump to levels no one has seen since 1968---or, indeed, EVER. But Trump is playing rope-a-dope, letting them air themselves out and exhaust themselves, and then will strike. And that is Trump; as much as he sounds off the cuff and impulsive, in truth he bides his time until he has the PERFECT opportunity.
I'm not totally sold on Vox's take, but Trump is far too smart to not see how corrupt it all is, and far too aggressive to just let it happen. Plus the whole "strike in one fell swoop" IS Trump's m.o. It's how he did all his building as a developer---wait until all the pieces are lined up perfectly, then swoop in, build quickly and make it work. It;s how he ran for president---he didn't start out as a Congressman or Senator, and did no practice presidential runs, but waited until the time was right---2016, with a change election and Hillary being so unliked and unloved, weak Republican field---and struck light lighting, changing the rules of the game in the middle of it and winning.
It's not crazy. After the last 4 years, anything is possible. And this take is not only possible, its probable.