All this is just 'it shoulda been Bernie' without even specifying a Bernie. It's letting perfect be the enemy of good, with the limpest hand-wave toward what would be better.
Meanwhile, the alternative to the lesser evil is outright fascism.
You should generally stop fascists from taking power.
If you want to do more than vote, go right the fuck ahead.
If you want to do less than vote, shut the fuck up.
This is literally the least you can do. It's not complicated. Choose less evil.