Some people, like you, in their "default" state can control their behavior to a degree that allows them to choose the "loudness" of their reactions to external stimuli. Perhaps you can still be technically angered by something minuscule, but at least you're able to choose to not react and refocus your attention onto something else. Therefore, it might be said that you have the ability to reflect upon your feelings and behavior in perceived real time and adjust them to some degree. It's like you're an external observer to a state machine of yourself, or you're running a reflective feedback loop always on, or that you can actually give the taxi driver of your brain actual directions that they would follow. Which, I certainly agree, is quite practical and useful, liberating even.
In my earlier comment I tried to imply that for many people what you experience as normal may be borderline impossible, therefore getting angry at a phone is "normal". It is that they may be not able to target their reactions with any precision that you're used to. I think you can find evidence of that pretty much everywhere.