If the only thing Biden does is be slightly more likable than Hillary he'll win. Trump won by the skin of his teeth in a handful of states. Most Americans didn't want Trump to be president in 2016 and the number is even smaller now.
Since 2016 Trump has created one dumpster fire after another. He's alienated everyone outside of his cult. And yeah, it's a cult if you support someone that suggests injecting disinfectants. It's one short step away from drinking poisoned kool-aid.