One Piece: The World Government Put a Bounty on Me from the Start

Zell has been in the world of Pirate King for five years. As someone who transmigrated, he always thought he was the chosen one, and figured that since he had come to this world, he ought to do his best to bring this screwed-up era to an end.

But he was wrong. After being hamstrung time and again by the World Government, the fire in his heart finally went out.

The Marines have to watch what other people think even when they go after pirates? Then what the hell was the point of me joining the Marines?

In that case, I quit. Becoming a pirate sounds like a pretty good choice.

Years later, the Zell Pirates become a force capable of threatening the World Government, and the fiercest struggle for supremacy begins.

PS: At first, the protagonist will fight using physical combat. Later, he may get a Devil Fruit, though the author is still deciding which one.