Yeah. The Republican establishment couldn't make the case that they've done well for the American electorate, so their candidates were tossed out during the primary process. Is that Trump's fault? Perhaps those in the GOP establishment bear some responsibility? I agree with those who have issues with Trump's style, but I believe the issues he's raised are valid and his positions on those issues is compelling, which is why he was able to defeat the likes of Bush, Rubio, and Cruz. Many elite conservatives may end up joining George Will in walking out on the GOP, but frankly, the grass roots that are supporting Trump probably don't care all that much.
He was able to defeat all those clowns because most of them brought nothing new to the table and the GOP primary electorate is become more right wing and polarized.