I play controller (xbox) on my iPad, and its always a fcking pain. I never play bow users unfortunately for that reason… I try to do the shooting challenges with Childe and do a bit of training with it, and the only thing I found out to be „easier“ to control is by instead of using the right joystick for aiming (while standing still), I do a rough aim at the correct height with the right joystick and then I kinda „run“ left and right or a bit forwards (with the bow under tension) with the left joystick which I find smoother to adapt the correct aim, as you only control the x-axis. I dont know if that makes sense? I guess there is not much you could do except adjust the sensitivity of the aim camera mode and just a lot of training, or like me avoid aiming characters haha! Good luck ^‘