Yes, it is a tough one! That is the point, but it also doesn't have to be accepted as the only condition. This doesn't mean that a person has to kill themselves to be thinner, but an attempt to improve the condition (even in failure) is valuable, isn't it? Sure, failure might feel bad, but we have to learn about that too. And also, most likely, thinner or not, you did get benefits from exercise and a better diet, even if it wasn't in hitting the marks you were looking for.

Genetics plays a big role. I am genetically prone to being "soft" (not really fat, but not fit), no matter what I do or eat. Though, I also struggle heavily with a sweet tooth and can't stay strict for long enough. However, I feel better physically and about myself when I am doing something to improve - even if I am not getting many outward-facing changes.