I'm sorry to hear you felt this way for so long.
However, there's this silly thing with marketing - it creates issues and problems. Even though it was never a legit problem and women didn't even feel self-conscious about having pear-shaped bodies, weight loss pills and gym promoters created this problem. Of course, it happened so long ago we couldn't feel it happening (although I can't pin-point the exact time) and now it came in our lives as a perfect norm.
Another example of such marketing-created problem is thin lips, it started way before the Kardashian-Jenner clan. Lip plumping lip gloss! Full-lip lipstick! Before and after photos everywhere. It was a very ingenious idea of some marketers, they made women self-conscious about their lips and in order to fix their "thin lip problem" they were open to buy lipgloss and lipsticks who enchanted their lips.
Of course, I might be wrong and this cannot be applied to every market and every country (but most of it) however as a marketing specialist myself, I've heard a lot of stories and ideas like these.
Next time you feel self-conscious about something, just think about it - is someone trying to put this idea in my head? It's sad, but we live in a consumer society. Businesses are doing a lot of ethically and morally wrong things, just to keep selling.
And well, Kardashians and Jenners are adding up to this whole thing right now, by "setting the trend". It looks like they're spreading a virus and a huge amount of girls, especially younger ones, are becoming clones of them. I'm really hoping that in the nearest future originality and uniqueness will become more valuable than that.
Also, sorry for a long rant.