The point is never that we need more democrats. The point is always that we need fewer Republicans. Democrats refuse to make things better, but they typically block things from getting worse, which is a better starting point than anything the GOP would give us.
So please, organize, protest, do whatever activism you can do, but on voting day take the little bit of time and effort to block Republicans from undoing all that hard work, even if it means voting strategically for a pile of shit.
The left will always be fighting against the administration to some extent, and through voting we get to pick our enemy, and the dems are going to be an easier fight and on fewer fronts.