Why is it so hard to find clothes of size xs nowadays?

Every year I shop online for clothes but this year, I decided to go out with some friends and look for clothes. I spent 3 hours looking for clothes that fit me. It was so annoying. I was exhausted and disappointed by the end of those 3 hours and luckily found some bodysuits that I like. I so badly wanted a dress since I almost never wear dresses :c

Do you have the same problem finding clothes that fit you? Is it just me or do stores barely have the xs size nowadays?
Why is it so hard to find clothes of size xs nowadays?
Why is it so hard to find clothes of size xs nowadays?
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