That's just thinking in logical fallacy. Just because the Republicans spent a bunch of effort and time focusing on invalid criticisms, doesn't mean there are no valid criticisms.

The DNC being made up of mostly center right pushovers is a byproduct of the Clinton's popularizing Third Way politics in America. It was a way to get around the gridlock that was dominant in the 80s and 90s in Congress.

The basic theory was that you would work across the isle on the projects you could, even if that meant making deep concessions. In theory you would end up getting credit for "getting things done", and eventually become popular enough to leverage your bills through.

In reality, Third Way politics is only effective until the opposition realizes that they now how the initiative over policy. They get to work across the isle on the projects they want, and that's usually economic policy.