Deku wants to be the world’s number one hero, but he definitely isn’t ready for that title yet. He would need to aspire to be someone like Goku who has held the mantle for a very long time in his universe. Deku is pretty strong but definitely not in quite the same league. Goku can end whole universes in a single shot while Deku would likely still be country level at the moment. Nothing to sneeze at mind you, but still not on Goku’s level quite yet. Goku wins.