What they have going for them politically is that people are mostly upset at their lack of fulfilling campaign promises, whereas the Democrats are hated because they did implement their program.

It's easier to run on "We'll get it done this time." than "Please forget all the crazy shit we just did."

It should go without saying that this is not an endorsement of what Republicans want to do. Their crazy shit is just more popular than the Democrats' and it hasn't blown up in their faces yet.