I feel like Hillary beat Hillary more than anyone tbf. Wikileaks showed she did in fact utilize her media connections to focus attention on Trump early on, thinking "aha, people will tune into the republicans and see this guy, no one will ever vote republican again!" Obviously and thankfully it backfired massively on her, largely because of the reasons you highlighted in your post. It's the same thing that got Carter elected tbh. People were so sick of the Washington establishment that a guy who talked and acted like an idiot was preferable to the other candidate. And that was Trump in a nutshell. Yes, he said some dumb shit. Yes he did a lot of dumb shit. Yes he offended pretty much everyone. But he was still preferable to, and less harmful than, another establishment candidate. And in 2016 no candidate within a mile of the ballot embodied the establishment more than Hillary Rodham Clinton.
Then she instructed her cronies to destroy evidence in the email inquiry which she likely would have been excused from anyway (unless the evidence was particularly damning which in her case should not be ruled out). That made it so that even if the reality turned out to be she was sending cute pictures of cats from a private email server rather than slipping out government secrets, people would still suspect her, simply because of the bungled-ass coverup attempts. Given the timing of everything, who knows, it may have been official emails to Epstein or it may have been her favorite Martha Stewart recipes, but the fact that she ordered a coverup of the evidence before it was known will always be known more than the results of the investigation at this point.
Then as if none of that was enough she got on camera and essentially said that at least a quarter of the population was deporable because of the candidate they supported who wasn't her. And in the middle of all that, before the real campaigning against Trump started, she pissed off half of what could have been her voting base by teaming up with the DNC to cuck Bernie and making it so obvious that even his dumbest-of-the-dumbass supporters took a break from screeching their demands for free everything to gripe about it and threaten not to vote Dem ever again. To be someone who so many, both friends and enemies, have called intelligent in a variety of meanings, Hillary Clinton really did fuck 2016 up for Hillary Clinton better than anyone else was even capable of imagining.