With the Democratic majority in the previous (outgoing) composition of the House, it was pretty much possible for the Democrats to ram anything and everything through if they wanted to, regardless of who their leader was.

Pelosi's adoption of that strategy may have led to tactical victories (she can brag that she got all Obama's priority bills through the House) but helped lay the foundation for the dramatic and overwhelming strategic defeat that Democrats suffered at the polls a few days ago.

In that sense, Pelosi accomplished very little. If she had been more bipartisan and conciliatory, it's possible that a lot of her bills would have passed the Senate and become law, which is the ONLY real measure of achievement.