The problem with Trump from that perspective is that Donald Trump is not exactly on the side of powerful unions, strong social safety nets, and taxing rich people. He did leverage anti-elite sentiment, but he did it unfortunately with walls and "keep the Muslims out", not unions, safety nets, and progressive taxation. Donald Trump as far as I know is largely anti-union, not on the side of more progressive taxation, and not on the side of strong safety nets.
I do agree that people are aware of the economic problems (hence the Sanders crossover in particular), I just think that identity politics right now is more powerful than economic politics in the United States. It seems like the issues that dominate the media headlines on "the left" and "the right" -- and, in fact, the angry rants on my Facebook feed, anecdotally, are very identity politics oriented. Unfortunately I think politicians take advantage of this. A classic example of this being North Carolina's "transgender bathroom" controversy. In my opinion, the provision that was far worse of that law was the aspect that limited individual cities from raising the minimum wage (economic politics). But it did not dominate the headlines, the identity politics did.
You are right that people are tired of Big Capital / globalist elites. They have reason to be. But to reverse this trend, we need stronger protection of the service industry (which is in effect the new manufacturing job) and we need stronger education systems to promote knowledge work. As long as identity politics obscures economic policies, I'm not sure how this is possible.