The outcomes aren't extraordinary. That's the entire point. The only people who think they are are those living in an internet fueled information silo that has lost touch with reality.
Just as the 2016 election was surprising to many on the left. The 2020 election is surprising to many on the right. But, in both cases, plenty of signs were there pre-election that pointed to the exact outcomes that happened.
As to "evidence" or "explanations"...multiple have been posted by myself and others in just this thread. But it isn't like you are going to believe any of them. So what's the point? Besides...since you require no evidence and have repeatedly posted that evidence and confirmation are just dirty liberal tricks to gaslight folks with real knowledge...who needs evidence anyways...