Why would we throw away our institutions after just a term and a half of a bad president? We haven't even made it to the midterms yet, where Trump and the Republicans look pretty likely to eat shit. Calling for assassinations and riots is entirely reactionary.
What institutions are left?
All of the ones that matter, just because the current president doesn't fit your ideals, doesn't mean society is collapsing.
All the doom-gloom feelings does not change that objectively and statistically the US and world is better off now that anytime in the past over long periods of time.
Elections, to start with.
North Korea has elections.