Fundamentally the difference between W. Bush and Trump is very simple:
Bush believed there was no policy more important than the Republic itself.
Trump believes there is nothing about the Republic more important than his policies.
The last time half the country adopted Trump's way of doing things is when the South decided the economic benefits it derived from slavery were more important than the Republic, and we had a Civil War.
I am not saying Bush did not have his faults, I disagreed with many of his policies, but Bush still believed in the system the Founding Fathers put in place. Bush believed in working within the system. Trump is either ignorant of, or I think more accurately, simply does not care about the system the Founding Fathers put in place. I think the truth is many Trump supporters also don't care about the Republic either. I suspect they think to themselves, "If the system, the Republic, with all its features, its institutions, its laws, and so on have left me behind, then what use is it?" Do you really care more about immigration and abortion more than the Republic itself? What value would stricter immigration policies and laws against abortion have for you if we didn't have a Republic anymore? Why would you throw everything away so you could stick your finger in the eyes of people like Jim Acosta? How does that make any sense?
The thing rabidly hateful and partisan Trump supporters have to remember is the following:
...in a big country of 327 million people, you're not always going to get what you want. Sometimes your favorite bill is not going to be passed. Sometimes your favorite policy will not be adopted. And you're going to have to live with that because that's the price of living in a Constitutional Republic that has hundreds of millions of citizens. Sooner or later, in order to get on with living your life, you're going to have to compromise with your fellow citizens. And it's fine if you don't want to compromise, but what's going to happen is the world is going to move on without you and leave you behind...just as it's already doing, just as you fear it's doing.
W. Bush was a two-term President. Trump has already been impeached and will likely not be re-elected, so there's that.