Such bitterness. I'm embarrassed for him.
I don't consider that "bitterness" so much as a clear statement of fact. I used to rant about the idiotic things George Herbert Walker Bush would do, such as "Kinder, Gentler, Conservatism" of breaking his "read my lips, no new taxes!" Pledge.
I was constantly furious with George Herbert Walker Bush because he *KEPT* doing non-conservative things, and as a result he *KEPT* damaging our brand.
Well now we own Trump, and I have little doubt that the things I hated to see George HW Bush doing, I'm going to see double or triple as many being done by Donald Trump. No, he won't be as bad as Hillary, but if anyone thinks he won't be compromising with Democrats a lot of the time, they are just not seeing history clearly.
People who claim to be conservative are going to be extremely disappointed with the things that New York Liberal (former) Democrat Donald Trump is going to do to "compromise" with people from his old party.
"Bitterness"? No, merely an accurate observation of what he is likely to do and how his current conservative supporters are going to end up feeling about it when he disappoints them by reverting to what he was before he became the nominee.
Donald will be saying: "Let's make a deal!" (with Democrats.)