GOP by and large wants to block things from happening. They want to hit the big giant pause button on society. And blocking things requires, drumroll please, only 1 of the 3. That's it. If the GOP has a single 1 of the 3, they can stop literally everything.
Passing bills requires all 3. Stopping things from passing takes 1. Also known as: it's hard to build things up, and it's easy to tear things down.