Left strategy has been terrible for years. That's one of the consequences of the Woke movement. Far too much political capital was expended on niche issues. Gays are 3% of the US population. Trans are 0.3% of the US population. Can't win an election catering to those groups. Too few votes. (See Sex in America, the Definitive Study,[1] which selected their survey group randomly across the whole US and followed up with mailed, in person, and paid interviews, until they got >90% participation. Most other surveys have some degree of self-selection of the participants.)

Occupy Wall Street never came up with a political agenda. Black Lives Matter had a huge agenda, and one of the groups claiming to be in charge had a document over a hundred pages full of demands. Nobody was pushing hard on worker protections or labor law enforcement - not cool enough, but affects a big fraction of the population. Nobody was pushing to break up monopolies that raised prices, even in apartment rentals and health care where collusion has been proven.

This lack of focus lost elections.

The Right agenda is basically tax cuts for the rich, plus God, Family, and Guns. That's enough to form a majority.

So here we are.

[1] https://archive.org/details/sexinamericadefi00mich/mode/2up