Why my classmates give comments about my clothes?

I just started degree with my new classmates. That is this spoil brat keep commenting my fitbit watch and my outfit for the day especially my shoes. Most of my shoes are bought from warehouse sale or so call discount shop. Also my school bags mostly cost between 30 to 45 dollar due to stain and tiny damage goes the same for the shoes. I cannot spend some money on myself for items I like but not expensive or first season 🤔.
Why my classmates give comments about my clothes?
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