I have never whole heartedly supported the Democratic candidate (because I'm far more left than any of them have ever been), but I've always voted for them, because they're far better than the other option. This time they're just so far better than the other option, not because they are any better, but because the other option is so astoundingly worse. So, I guess, welcome to the club.
But I will say, Biden has been more progressive than any other candidate in my lifetime. Again, that's not saying much, but hey, it's better than nothing. He's just killing himself by supporting Israel.
I supported them wholeheartedly for like a day when I moved from libertarianish something in my teens and early twenties to slightly progressive. I feel exactly the same.