More people voted for Biden for one of the following reasons:
- They agree with him more on the issues
- They wanted to specifically vote against Trumpism
- Some combination therein
This can only be confusing or complicated for someone who isn't putting much effort into thinking.
Trump doubled his black vote percentage from 2016, flipped somewhere around 30% of registered dems including many previously apathetic ones who hadn’t even been participating in recent elections, drew crowds only ever rivaled by Obama where people were camping out for days in frigid cold winter weather just to get a seat at a rally, had people organizing boat and car parades all over the country including a car parade in Arizona where there were literally over 90 miles of cars, etc etc etc.
If you believe Biden still got 10 million more votes than trump when he could barely draw a crowd of 100 then the only one not thinking here is you