November 2019
Make more controlls customization options. Keep punching midfight and cant disable it.
November 2019 - last edited November 2019
Change your button layout to "Button Puncher" so pressing down on the analog stick is crouch instead of melee. Most of the good controller players also use this layout since it makes crouching during fights much easier than the standard loadout.
Alternatively, just practice relaxing and maintaining your composure during gunfights instead of tensing up. This is difficult at first but can be done with some practice.