There were a few people like that, but they were a minority among Obama supporters. Many of them even criticized Obama for failing to follow through on his promises. That's something Trumpcucks don't have the balls to do.
In recent years, we've seen Obama receive more criticism from the left, although the criticisms sometimes just seem to be a matter of leftists thinking he wasn't far enough left.
It's a pretty clear indication that a large portion of the Democratic party has gone extremist.