I think you’re misunderstanding why the Dems lost. “The left” that you’re referring to doesn’t exist in the way you’re imagining it. Kamala didn’t win enough swing voters. Swing voters don’t view themselves as leftist or rightist. Swing voters (apparently) vote based on their feelings.
Because there is an afterlife where you will live for eternity, so just accept fate and follow god’s plan for you—god has a plan for everybody.