Not quite enough years ago, there were bumper stickers floating around Louisiana that read “Vote for the Crook, It’s Important.” Convicted felon Edwin Edwards was in the runoff against KKK Scoutmaster or whatever the fuck David Duke. I think most moderate folks endorsement of Biden was less an endorsement than a desire to get Trump out of office.
I don’t think it’s mutually exclusive to be of that opinion (I was), and to also think this is one of the greater failures by a President (especially as a relative unforced error- there were lots of ways to exit Afghanistan in a less catastrophic way for our folks and for those that supported us) in decades.