Brexit, the war, climate change, etc... are all simply props for Johnson's personal ambition. They are the means to an end.
I doubt he really gives a fig about his loyal Brexit fans, Ukraine or climate change.
IMO he was the very last person who should have been in charge of Brexit - not that I think it was the right decision to leave, but the main protagonist should, at least, have been someone who was totally dedicated to the 'cause' for its own sake. And someone, who might have had a notion of the lives of the ordinary voting public,
He appears to be bound by no code other than that of self-promotion. Laws, regulations, Parliamentary ethics, don't apply to him. If anyone opposes him, they are wrong - wrong because they have opposed him.
IMO he has damaged the country beyond repair and we will all, Leavers and Remainers, pay the price that his self-entitled, narcissistic personality has inflicted on us. And I don't think he will ever have a moment of reflection, or doubt... he will just continue on his cavalier, vainglorious rampage.
The Gods forbid he ever gets anywhere near the levers of power again.