By the conservative establishment, I mean the modern conservative movement, founded in the 1950s by William Buckley and others. Thus movement was partially co-opted by former Democrats who moved rightward as the post McGovern party moved leftward. This group are the core of the neo-conservative group that came to prominence in the 1980s pushing aside the traditionalist conservatives.
This movement became way too comfortable with the RINOs in the GOP, often, like Paul Ryan, passing seamlessly between the two groups. Trump has been the equivalent of a fire, burning away dead and dying brush and cleansing deadwood.
I agree with your statement. Initially, and today to some degree just dislike Trump or his mannerisms. Perhaps these mannerisms will be the very thing that will bury the Clinton campaign...I dunno.
What I do know, Trump won me over with his nationalist tone. If he does 50% of what he’z promised...I will consider his time in office a success for the average Joe-sixpack.
Beside a Trump presidency, I don't see much hope for the longevity and health of the U.S.