Why is it so ugly to take pictures?

The problem is - running out of light. Generally, when the things seen by human eyes are transmitted to the brain - imaging, there will be part of the "thinking" (impression) inside. The camera imaging is a "real" reproduction of the scene at that time. It has no "ideas" and no prejudice. Reflect reality (you can make "reality" so that it reflects it). Therefore, you have to use light to outline your perfect self. This should refer to some portrait photography lectures and works. You can also put a mirror in front of the camera. When you find your "most beautiful", remove the mirror and focus on taking pictures. If it is just a "body shape" problem, you can also use software to solve the problem later.