One of the reasons that Trump got anywhere at all was because he is on Twitter so much. I have been shown clips of the TV spots that he has and they are awful, but that is because he doesn't care. Trump actually tweets out himself all day
Trump got places because he sold the electorate lies and promises that were either impossible to keep or wish fulfilment. Nothing new there, but he and his advisors honed in on the discontent and hatreds seething in the US. They refined it, with all the "right" rhetoric, all the dog whistles and sense of empowerment that the so-called victims of liberal administrations were finally due. It was done with populism, rage, conspiracy theories, possible foreign intervention/support and yes, social media.
Targets were chosen - liberals, socialists, minorities. It shouldn't be any surprise that it was going to get ugly. Trump's record in bigotry and corruption goes back to the 70s with his rental record in NYC, later on his dodgy business empire, his taking out ads against the Central Park 5, his birtherism etc. He said things that others dared not say, forget the Tories dreadful "are you thinking what we're thinking" campaign, this was naked and provocative fury.
He took the lid off America and exposed what's always been there. And then he went further and waged war on science, the environment, history, logic and gas lit an entire nation. Whilst populating the White House with criminals, white supremacists and conspiracy theorists. Not to mention enriching his pals, cronies and family.
It's never been so blatant before. But maybe, out of all of this, some good will come. The US will have to face up to its hypocrisy and loss of standing*. It may lead to more and more voters turning to socialism, or grass roots activists putting pressure on the upper levels of the Democrats.
It'll take a generation or two before we know.
* Of course, for many, it never had any standing, with it's blatant disregard for sovereign nations and elected governments that didn't toe the line.