Probably relevant life and body positivity tip from a sewist, pattern drafter and seamstress:
The clothes are the problem. Please try to remember that you are not the wrong shape, size or dimensions. If the shirt doesn't button closed the shirt is too narrow, you're not too wide. If the dress sags at the back it's the dress pattern, not your ass. Absolutely nobody makes clothes that are Actually Your Size unless you custom order or make them yourself. Even then fitting is a skill and an art!

You're not the problem, the clothes are.

@sinituulia Yeah, I'm ready for those automatically generated clothes that were promised by sci-fi writers ages ago.
@Triffen Honestly we could probably produce knitwear to people's exact measurements already. Heck, we did that at school when we were learning machine knitting: We calculated the pattern based on our individual sizes, and then did maths to translate that to stitch count and such according to a test swatch with the yarn... And onto the machines we went. True, we did it by hand and thus were the computer, but there's no reason you couldn't just let the computer be the computer!

@sinituulia @Triffen and the technology is already here to take a number of measurements, let a computer draft a pattern for sewn clothing, and then have a human sew them the way all other mass produced garments are sewn, except they would fit significantly better (even if less than clothing that has been fitted on the body).

I think that there are companies providing that service, but I suspect mostly in the countries where most clothing are already been made.

@valhalla @sinituulia Yes, I use such generated patterns myself, but the sewing part is still lacking.