Again, extreme gerrymandering, a strong economy and more democratic senate seats in red states up for grabs made it difficult for Dems to win the Senate. The fact that they took the house despite all of that is amazing, and they gained five governors.
I know. (I actually did a little thought experiment to redistribute the US states into ones with roughly even populations, you end up with 25 states and a geographically gigantic state in the Upper Midwest.)
But meanwhile a lot of progressive ballot initiatives passed, even in said red states where you had Donnelly, McCaskill, and Nelson losing.
EDIT: Well, I should say, Donnelly and McCaskill, despite Florida being under GOP control and having two Republican Senators the margin of victory was so narrow that it's still a swing state.