Non-US guy here. I don't get why there's a choice whether to vote for him or not, when you know the alternative is Trump.
It's clear Biden isn't a great option, and there's probably plenty of reasons not to want him. But is any of those reasons gonna get better in the next 4 years when his opponent would win?
Not wanting to date someone because of their beliefs sounds like a perfectly valid reason. Especially if those beliefs can impact someone's rights