Do you give a crap about your house/clothes/appearance/girlfriend/boyfriend/dog/job??? Why is a car any different?
Always have some pride in what's yours.
people do but they make choices, some spend it on the house, afte rall, most of us spend much more time in house then in their car. some spend it on clothes and clothing accessories, arguably you spend more time in clothes than in a house or car. Not everyone has the budget to buy what they exactly want.
Others see a car as something purely functional, and they couldn't care less what it looks like.
What you think is a nice car may be unattractive to others, be aware of your biases and point of view.
And lastly, a car is nota reflection of a person, if that was the case psychology would need a new field of research: inferencing personality characteristics via the car someone drives, we'd run into issues with multiple cars...MPS?