Yes and no.
Either on some level they are satisfied with Trump or they don't want Biden, but the two aren't mutually exclusive.
People who don't want Biden fall into two or three camps:
1. People who are disgusted with Dems for not being leftist/Black enough and are staging a non vote out of protest.
2. People who take issue with Bidens stances (he legitimately says alot of dumb shyt).
3. People who think he's a racist and/or rapist.