Izuku wants more from himself, he knows he deserves more from the body he was given. He knows the world doesn't believe in him. The world will never open its eyes to someone different, that's just a known fact about people. The probability of people accepting Izuku as a hero let alone a vigilante is extremely low. That just means he has to take that probability by the throat and leave it behind him. You can guess what he does with that.

Izuku's tired. Tired of shitty people and shitty lies and a fucking shitty life. He's just so tired. So with nothing but his savings and the hope of a fucking Craigslist ad, he leaves- a one-way ticket to the US, a new life, a new beginning. But history always bites you in the ass. And two years later, those he left behind see what truly has become of the person they broke down. And the people who put the fragmented pieces back together.