|Unfortunately for the country, he WAS legitimately elected, and while we may not like the results of an election, we have to live with them. |
You're correct that "we" - as in the majority of the voters - didn't elect him, but we're stuck with an obsolete concept called the Electoral College. But there's a bright side for 2020 - Trump only won by a total of about 70,000 votes combined in three states. That's not the landslide he keeps claiming - it's a very narrow victory.
The country has had two years to see who he really is and how incompetent at this job he is. The 2018 midterms were an indication of how unhappy the voters are with him - although he tried to spin it as a victory because the GOP picked up a couple of seats in the Senate, that was not unexpected - there were more Dem seats up for grabs than GOP seats. The GOP lost 40 seats in the House, and that margin of victory WAS unexpected. In 2020, there will be many more GOP Senate seats up for grabs than Dem seats, which means the Dems have a good chance to take the Senate as well.
And that 70,000 vote margin that Trump likes to call a landslide? His approval ratings are in the toilet - he has a solid base of about 35% of the electorate who are still supporting him, but that support has been slowly eroding because of his dumb moves like the tariffs and the partial government shutdown - and 35% is not enough to win an election. Assuming the Dems can front a challenger who is more acceptable than HRC, those 70,000 votes will be gone - and so will he.