I find it interesting how the West hates him so much.
That's not interesting at all => CA.
I'd say it's interesting. Before Trump came around, it was rare to see regional polls that showed a national Republican candidate (or president) doing worse in the West than the Northeast. Sure, there's California, but the Rocky Mountain states moderate "the West" enough that it's not as far left as the Northeast. But for Trump, in pretty much every single poll, he's in worse shape in the West than the Northeast.
Trump's weak wins in UT and AZ, and outright loss of NV (a state tailor-made for Trump) demonstrated that Trump was never so popular in the
inhabited intermountain west. But the population of the urban CA/WA coast is so large, and its voters so negative to Trump, that it must strengthen the overall lean seen in the polls.
Does this represents any overall decline in the sunbelt conservatism so evident in the West as a whole starting from the 60s? I won't go that far.