1. There's more to the job than coding. If you think that's all there is, you have much to learn.

2. "only a few very small changes get done,"

To me, you can learn to make large changes. Your skill level determines how many changes you get done. You can work harder to get more done.

3. When you work harder, your skills grow, your compensation will grow. FAANG is usually good at this. If they aren't, you can quit, but this takes at least a year because promotions are lagging.