You mean going on benders and falling down staircases and passing out at important events, then disappearing (presumably to recover) for weeks afterward, being too lazy / forgetting to campaign in key regions, and taking her win for granted?

I don't see it. What she had was massive corrupt machine built around her campaign, which included the media, internet giants, the DNC, the previous administration's compromised law enforcement and intelligence agencies, and election rigging and voter fraud, all pushing for her and covering up her failings.

She wasn't senile like Joe Biden is, she's obviously highly capable in terms of moving up the ranks of this crime syndicate. And she can put on a decent performance in scripted speeches, she doesn't leave you thinking she has no idea where she is like Biden does. But if you actually listen to her content it's just regurgitating the same vapid meaningless leftist/globalist committee-developed, focus-group-vetted talking points.

Keep in mind she lost to a "community organizer" who came at her from the left, before losing to Trump from the right.

Point is she isn't that good and almost everybody could see through her, and she still came a lot closer than she should have thanks to this corrupt machine. It will be the same with Biden if they don't replace him it's quite possible they'll make him win with election tampering alone. So don't be complacent.