Exactly.
On the bright side, from purely anecdotal evidence of folks I know or am related to, I can count about a dozen South Carolinians who voted Trump that regret their vote and are voting Biden this time around. Again - purely anecdotal, but if everyone knows a few people like that, then that adds up. Gotta find hope where you can.
That's at least encouraging. I've seen interviews with similar people in other states. Of course, who knows how representative they are? What seems clear is that there are quite a few of them.