Clinton did it to herself. I've posted the numerous reasons so many times, but it seems Clinton supporters just want to ignore them and put all the blame on someone other than the person who caused her own defeat.
As a Clinton supporter I have to agree. We knew she was a crappy candidate going into the race, we knew Republicans had her number.
Had she been elected she would have done a great job, but she was never able to overcome the baggage and her own ineptitude at campaigning.