You can point to the exact moment the GOO was primed to go off the rails and it was that crazy old white bytch that was trying to call Obama a Muslim and McCain shut that shyt down where as Trump fed into it (among a lot of other conspiracy bullshyt because he knows they are dumb as fk and want to believe in crazy ass theories like Q).McCain saw where shyt was going. He also wasn't a sore loser. A lot of old style conservatives have retired or walked away. They see the party declining and I'm sure they had data showing voting trends. A slow slide to the abyss is still a slide.
Yeah losing the House sucked but it's the first midterms after a president is elected. He actually by all means should have lost them both. The fact that didn't happen( and the fact the margin in the House is small) spells trouble in 2024 for the right and they know it.