Dude, there's no guarantee Trump stays in for only 4 years.If it's any consolation, and it probably isn't much, but: firstly, I still think the UK fucked up more. Trump is for four years, Brexit is forever. So you're probably not the 2016 titleholders for biggest fuckup. Secondly, everyone else in the Western world is going through pretty similar troubles right now. The death of industrialization is driving the working classes towards authoritarianism everywhere. So there's people all over this world looking for a solution; the struggle isn't alone.
And even if he does he's going to have all three branches and the SCOTUS at his disposal, not to mention the vast majority of Governors and state legislatures across the nation. We could have a nationwide poll tax by 2020 for all we know. I know that sounds extreme but literally NO ONE knows how Trump is going to govern and what kind of advice he will take into consideration from the people surrounding him.