God, you really are blatant with your "anything that disagrees with my world view gets ignored and derided" schtick, aren't you?
Boris and the Tories got in last time because an awful lot of Brexit voters got behind him. Pretty much every racist in the country was included in that group, because while not every person who voted for Brexit was a racist, every racist that voted put their crayon cross next to "leave". That's still a fact today, and trying to pretend that's all in the past is either hilariously naive, or a transparent attempt to steer the narrative in the direction you want.
As for Rishi, you think the mob that thought Boris was a good laugh and the kind of guy they'd have a pint with will now get behind a serious brown person with a tax-dodging billionaire wife? I guess anything is possible since Boris managed to fool as many people as he did, but I wouldn't stake a bent penny on it myself. Especially if the economy is STILL in the toilet by then, because Rishi doesn't undo the worst aspects of Brexit. But that last part goes for any of the Tories that take the leadership on.