It's almost like he was running against a firebrand incumbent who famously caused a tear filled meltdown of the other side and then presided over the beginning of an alleged pandemic. Very strange when y'all get so excited over how much anger, sadness, and hatred Trump inspires in your enemies, and then act surprised when that passion he engenders turns into results at the ballot box.

Fear is an extremely powerful motivator, as is the trap of the two-party system. Joy is an even more powerful motivator, which is why Trump will win again in 2024, but Trump has honestly been posting bigger W's out of office, as his influence on the courts finally trickles through (the courts taking a long time to do anything) - so it's not surprising that he wasn't able to muster enough Joy in 2020 to beat Biden's Fear.

Also, remember that Trump got more votes in 2020 than he did in 2016 - it was a big year for turnout in general.