i feel much the same way.I've lost all enthusiasm now that all the progressive candidates are out, and frankly barely care anymore. This has the silver lining of this election cycle not affecting my mental health like the 2016 one did.
4 years of Biden won't really be that much different than 4 more of trump, for most. We won't tax the rich, fix healthcare, fix housing in cities etc etc etc either way. Nothing will fundamentally be different. This country is cursed.