That's the point, you're meant to shoot while standing/crouching down. This is a tactical shooter, not an action one. Characters experience a lot of recoil because they're small and light, trying to shoot while jumping or ragdolled will always be very inaccurate. Telekinesis is not meant to be your main movement method, and is meant to be not much more than a small advantage and a way to throw physics objects at enemies etc.