Superman was touted as being “faster than a locomotive”.
Locomotives move at a speed people can comprehend. It’s an easy to understand expectation.
He didn’t have to be faster than a plane or a bullet in order to be Super. He just had to be faster than any man.
He didn’t have to leap the tallest building, just tall ones. Really, any building would do, since no one else was leaping over buildings.
Superman seemingly owned the market for folks looking for a superhero.
Yet Spiderman, the Green Hornet, Wonder Woman, Flash and many others somehow managed to find work.
Don’t let Superman scare you out of a market that has plenty of work available.