Okay, so let’s just ignore for a moment that the Marvel universe has freaking metal manipulators like Magneto and Polaris, who would absolutely wreck your shit, like Wolverine and Colossus would attest. Let’s consider the physics here.

This is from some quick and dirty searching online: steel has a melting point of about 1500 °C. For comparison, a meteor heats up to about 1600 °C and its slowest speed is about 34 machs. Unless your character has some way of mitigating heat caused by air friction then you can only run or fly at about 15% of your maximum speed before melting into slag.

So I would say, yes, you are overpowered in the sense that your own powers would kill you.