It's absolutely use it or lose it time. The USA needs better rulers and politicians across the board and major social reform - this is your main fight.

There's a reason Trump was able to tap into working class discontent and the lack of education and critical thinking in the USA was legendary since the 1980s. If social media has taught me one thing, it's the difference between the public portrayal of your country and the lived experience of ordinary people. USA is truly an awful place for the common man. How is it legal to live in your car? Healthcare costs atrocious, student debt that will haunt you for the rest of your life... As someone from the former Yugoslavia once said to me:

It's very easy to make poor people hate each other

Getting rid of tyranny here was a complex process and the larger geopolitics of the end of the cold war played a role and our international isolation was pivotal, especially the loss of support from the USA. The nationalists here bankrupting the country fighting a bush war as a US cold war proxy was a huge factor: they negotiated because we were on the brink of collapse.
Curiously enough, your Trump seems to be orchestrating that isolation process himself. It's also fortunate that the buffoons that he has surrounded himself with and put in power can't outlast him, even in the eyes of his base. That's a feature of despots: there is always a cult of personality and a succession problem.

Over here, public protest exploded in the mid 80's and constant declarations of states of emergency and police brutality did nothing to suppress it and from there it was about 10 extremely intense years, things actually got worse once negotiations commenced in 1990 as the apartheid state ramped up its covert war through proxies while officially taking the line that state repression was over. We almost didn't make it through the 90s and this is the main danger that you will face at home. ICE is a manifestation of that