The hitbox of the player is actually in the center, but I do agree that it needs some adjustment still.
I dabbled with the idea of having the dash go through bullets, but I usually don't enjoy that this makes dodging sometimes trivial. If I get around to adding more enemies and maybe some bosses that shoot many more bullets, I would want to keep the sense of skill of dodging through base movement and have dash be used as a simple position relocator.