She lost because she failed in so many ways, one in particular in failing to comprehend the way elections are conducted in the USA following the constitution.
Trump was a lousy candidate too, but less incompetent than Hillary so he managed to win. Carly Fiorina could have beaten her, Marco Rubio could have beaten her, Ted Cruz could have beaten her, and pretty much any Republican candidate besides Trump could have beaten her, and by a bigger margin. You may like Hillary, but she was an inferior candidate without skill who did not inspire much of any confidence or loyalty. That she thinks she is going to save the Dems is hilarious. That someone else suggests it to her may be cruel.