You are quite correct. I've written multiple times around here that starting in 1976 when he challenged Gerry Ford for the nomination, the GOPe hated Reagan and hated his supporters, and it hasn't abated one iota since whether it's been the Tea Party or now Trump and MAGA.
The GOPe believe that Reagan literally and figuratively ruined their party. They had safe seats and all the pork and hookers they could want in exchange for being the loyal and acquiescent opposition, and Ronaldus Magnus wrecked all that by inspiring Republicans to win instead of just going along to get along. It's about the only thing that they GOPe have been right about.
And then they imposed the “poison pill” that was George Bush on Reagan.