I don't know why humans hate their bodies so. It's endemic. Birds don't hate their bodies. Neither do rats or cats or apes or tigers........what's up with that? I do hope you are able to love your dear body. A body does such amazing things.
We hate our bodies because that's how we are raised. We are raised that way because in the distant past priests and kings and chiefs and whatnot decided that biology was sinful and tempted one from the path of god. (It is the most common interpretation of the story of Adam and Eve.) So we needed to cover those bodies in order to stifle ordinary human behavior.
Well, it didn't work. Human sexuality is a constant. Clothing doesn't reduce the sexual drive at all and one can even carefully select clothing to increase it. Once you start down that road, seeing a body becomes forbidden fruit. Voyeurism and exhibitionism become fetishized and the official reaction to that is always greater restriction because nobody is capable of realizing they went down the wrong path. The Victorians with their multiple layers of clothing and guilt-tripping were just as sexual and far more tweaked out about it, as are other highly repressive cultures today.
Religion is a collection of memes of incredible staying power. As science has become able to provide answers that religion could not, its influence has waned. As affluence has reduced our workload and replaced long hard days of struggle with opportunities for entertainment and play, religious influence has waned. Technology in the form of contraception allowed us to bypass pregnancy and reduce venereal disease from a common tragedy to an occasional inconvenience and in doing so allowed the sexual revolution, further weakening traditional religion.
There is no shortage of beautiful bodies online in all states of undress. But body shame and body fear continue. Part of it is that core of nudity = sex and sex organs = shame that hangs on in everybody's upbringing. We are still more religious and morally conservative than Europe. But there is also the unrealistic comparison we make with the made-up, manscaped or femscaped, photoshopped perfection we see every day. Most people don't actually loath themselves because they don't look like Taylor Swift or Brad Pitt but there's always that bit of insecurity in their mind.
Fantasy is far more exciting than any reality. OTOH if you see something all the time it becomes unremarkable. It takes the forbidden fruit aspect away and you can focus on other, more useful things. At a nudist resort, you see all kinds of bodies and all bodies are accepted and not judged. Most nudists, like most humans in general, are NOT the photoshop ideal. One reason I like being a nudie.
