Everyone who said "mind my own business" is right, but I would also add,
No matter what you do, your main job is to get along with the people you work with. Whoever is running that shop wants a working system, and that's important to keep in mind.
I had a pretty good job building guitars, when I was around 20. Once I had gotten my routine streamlined, my mind was free to focus on what I didn't like about the people around me. I see this a lot at work still. I felt like I was outproducing the three people I worked with, and I figured I was free to act like an idiot.
My boss tried to talk to me, he was actually really creative in explaining his point of view, but I kept being a jerk, and when he let me go he explained that my work was very good, but he had a problem to solve, and he couldn't solve it by firing the whole rest of the crew.
It would be nice if this experience benefitted someone younger, but who knows?