The problem is even when they have control they can barely do anything because of dumb rules like the filibuster, or blue dog senators.

Biden also doesn't act very left. He's passed a couple good pieces of legislation, but he doesn't support popular movements like labor strikes and prefers to make backroom deals (which residues their power for the future organizing), and he's very staunchly pro genocide for some reason, and been as hard on the border as Trump. He's just not as fascist as Trump but don't let the skewed Overton Window deceive you. He's a centrist moderate Democrat, like an Obama who learned to stop trying to reason with Republicans earlier and picked a few really good people for some cabinet positions (not Blinken, but like for the Secretary of the Interior BLM or FTC) and many meh people for others.