I think the big point that people are missing here is how much the political landscape was changed by covid. If there was no pandemic, I would be explaining to everyone why Trump won in a landslide, or by similar numbers as he did 4 years ago.
We're experiencing a global event right now. In the short term this has absolutely affected every person in the country. Some in good ways, and for many more in negative ways. There are also going to be long term consequences that I think people are beginning to realize that may very well outlast a first or even (unlikely) second term for Joe Biden. And people began to realize during the summer that Trump was not managing this crisis well at all. During the first couple of months when he was doing the daily press conferences, his approval rating was the highest it had ever been throughout his first term. But when he embarrassed himself saying people should put hand sanitizer inside their bodies to kill the virus, he was shamed away from those pressers and his ratings dropped. He held rallies for months telling people that Covid is just like the flu, that its not bad, and that it will go away very very soon. Except when the messaging on Covid is the same in September as it was in February, the idea that its going to go away very soon, people can see through those lies and wishful thinking very quickly. On top of that, Trump displayed that he has no idea, nor any desire on working with Congress in order to throw regular people and small business a lifeline during a pandemic thats absolutely crushing them. Coming out on Twitter saying that you're telling republicans to kill a stimulus bill less than a month before a major election was a colossally stupid move. He basically just signaled to both parties in Congress that they don't have to do their job and that He would take the heat for them as Americans demanded stimulus relief.
Trump's inability to be on the right side of Covid hurt him in this election. And even though a lot of people who support him share his cavalier attitude towards the virus, many more people don't see it that way. A lot of people do take this virus seriously, and they wanted somebody, maybe anybody who would show a little more interest in taking the virus seriously as well. In comes Joe Biden. I can promise you his voters know that he is half asleep. They know he is a shell of his former self. But they chose him in the general election over Trump because they obviously viewed him as the lesser of two evils.
People's inability to accept or try to understand this logic is about as vapid as Hillary shills who think all Trump voters are racists. You're all wrapped up in your own little bubble that Donald Trump created for you. Maybe its hard to believe, but there are normal people in this country who do not support Donald Trump. They don't love Joe Biden or think he's great. They just know that at least the next 4 years won't be a total clown show like the last 4 were.