Then Obama was counting on many people not to understand politics when he chose to make promises on things he wouldn't have the power to change.
I think that as much as in specific deliverables, "the Left" feels rather thoroughly betrayed, on that front.
In this specific instance, he should have called Congress out on their behavior.
People understand real compromise. They also understand that when the other party is completely intractable, there comes a time when you confront them on this. Or you lose power.
Or... your original position was actually different from what you projected.
It accomplished absolutely nothing.
Look, when you have an entrenched party, backed up by the ultra-rich, that has sworn to do anything in its power to make sure you fail, there's not much you can do, even if you are the President of the United States.
Due a lawsuit and illness and death the Democrats had a filibuster breaking majority for something like 58 days. And even then it would require every single senator to be in agreement.
I remember when we expected statemen to work out difficult conflicts. Now they just throw up their hands and say "He did it" while people cheer them on for "sticking to their guns". It isn't our fault, they are the ones that refused to compromise by accepting my proposal...