Obama delivered a terrible, watered down healthcare change. Biden could have pushed a lot more money out for student debt relief, but thought that spending the money on the border wall and weapons for Israel was more important.
They could have done drastically more, but spent those 2 years sucking up to corporate doners, and giving consessions to the Republicans instead.
You may think that "please don't bomb children", or "please stop giving our tax money to the rich" or "maybe medical debt shouldn't be the biggest cause of bankruptcy in the US" or "please, make education affordable" is asking too much, but I think it's not asking enough, and the Dems wouldn't even deliver on those. They could have, but chose not to.