Mainly record high inflation and the gas crisis (which was way worse than today's).

Whether or not anyone could have stopped that doesn't matter, ppl attribute this to him.

He was also blamed for not bringing home the American prisoners that Iran kidnapped.

I never understood that. He authorised a mission to do it; it was hardly his fault the mission failed.

"Mission Accomplished!" Yes, they all get blamed for things not under their control.

His biggest issue was that he was a manager, focused too much on processes and policy detail.

A President usually sets the tone and direction of policy, but avoids personal accountability for the details for a variety of reasons.