Why do the Democrats seem so ineffective?

They control congress and the white house. Yet, they can’t seem to get much accomplished or follow through on their promises.

I just finished reading this article that argues that the Democrats are giving lip service to things they secretly don’t want to pass:

“This is what the Democratic Party does; it’s who they are. They’re willing to feign support for anything their voters want just as long as there’s no chance that they can pass it.”

“The primary tactic in this game is Villain Rotation. They always have a handful of Democratic Senators announce that they will be the ones to deviate this time from the ostensible party position and impede success, but the designated Villain constantly shifts, so the Party itself can claim it supports these measures while an always-changing handful of their members invariably prevent it.”