What people forget about, and young people weren't old enough to know, is that set aside the Iran hostage crisis, and you still had a very miserable America under Carter.
The man simply oozed pessimism, every time you saw him (thank god there wasn't the 24/7 cable news cycle) it was like there was this gray cloud over his head. Each time he held a press conference, you just immediately thought, "oh god, what's happened" ?
Mortgage rates were right at 18% under Carter. Did you guys catch that ? 18 fucking percent !! This country was at an utter stand still, absolutely nothing was happening, and the guy simply wanted you to toughen up, put on a sweater and turn down your thermostat. It was like living in a black and white movie.
Reagan, or pretty much anyone with a smile, saying we could do better would have won in a landslide.
Carter did try to rescue the hostages, with his failed helicopter crash in the desert, and even if it would have been successful, this country had had enough of this guy and his blues. It was time to clear the cobwebs and get moving again. Reagan could have stood on his head and told dirty jokes and he still would have won.