Huge, crooked teeth. Orthodontist says there is no cure? (Photos)

I had gotten my braces removed two years ago. But i am not satisfied with the way my teeth look. They are really big and in such a way that it looks as if there are gaps in between. I can't close my lower lip because my upper teeth cover the lower ones. I want my teeth to look like a perfect set and this is really bothering me. What can i do to solve it?

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