How do I deal with feeling powerless against physical limits at work?

You are up against something that does not care how you feel about it. The ground, the physics, the limits of the machine. You are learning to accept them, and that is wise, but the frustration is still real. Accepting a hard truth does not mean you have to like it. Here is what helps: the frustration usually comes from wanting power over the part you cannot touch. The ground was never yours to command. But how you plan, how you prepare, how you respond when it pushes back, that is entirely yours. Move your effort there. The more you spend it on what you can actually change, the less the powerlessness eats at you. Next time you feel that frustration rising, name the one thing in the situation you can still control, and put your hands on that. Even a small thing. It pulls you out of the fight you cannot win and back into the work you can do. The ground will always have the final say on some things. Your job is to be excellent at your part.