You're saying that your choice of car defines who you are and that you use this as a criterion when you look at others, is this an accurate representation of what you feel?
Because if it is, I have no problem with it. you're a 21 year old young man and that's how many young men your age feel.
What I hear others saying, however, is that many people, as they age, marry, buy property, and perhaps have children, de-prioritize cars. Can you understand that this may be the case?
That that you should de-prioritize cars, but that many people do.