There is no perfect aim but you can toggle an auto aim in the game settings. Also hitting L1 zooms you in a bit on your target making a headshot easier to achieve. Depending on the weapon making the headshot, even 1 shot can drop you dead. Not much you can do to combat a good players' dead aim other than stickin and movin GL
How do you toggle auto aim ?
My #1 Tip for Peakvox Ninja: Always be on the move. This is a game where you have the freedom to roll, jump, double jump, and dash. Use this freedom of movement to dodge your enemies attacks! If you're getting hit, you simply aren't moving around enough. Makes sense, doesn't it?
As for improving your accuracy, there is a way. When you enter the game lobby, use the left/right d-pad buttons to find the Control Options. At the bottom of the Control Options menu there is something called "Aim assist sensitivity". Set it to 0% and it will turn off the game's aim assist, allowing you to make more accurate shots. Contrary to what the name suggests, the game's aim assist only makes it harder to shoot moving enemies.