They're not a political party. There's no actionable platform, no leadership, no direction. It's not possible to band together around things that they're against and still get things done. Cry all day about it, but any adult knows you can't turn back the clock.
To lead you have to have a way forward. Republicans haven't been able to figure this out for decades because they aren't a cohesive group. They're a backwards coalition of bastards and need to be divided into their corners under dunce caps until they can coalesce into separate parties under actionable terms.