Bush pere was a squish of the same variety. And Ford. And Nixon. And Eisenhower. And Hoover. The only real conservative in the white house since Calvin Coolidge was Reagan, and he had liberal congresses that kept his accomplishments to exactly the same combination of lower taxes and hawkish foreign policy, that all the others managed to accomplish.
You are living in a delusion about how conservative the country and the party have actually been in the past. McCain is square in the middle of what we have actually settled for my entire life. Reagan fought for more, he and Newt are about the only ones who did, and both failed to get anything more than the Bushes etc. Both depended, even to get the chance, on immediately prior liberal overreaching and disasterous policy, and neither could enact a full conservative agenda.
And there have been all of two such occasions in literally 80 years. If you walk away from US politics whenever you don't get that, you might as well give it up for good, and take up knitting.
McCain made a name for himself by screwing Pres. Bush. He almost switched parties twice. He is the mainstream media’s favorite RINO. McCain has a liberal voting record. This is a fact he can not escape. You are deluding yourself. You might believe McCain is the best the GOP can do. I do not. I will not settle for McCain. He is detestable and unfit for command.