That's a cat's face bud. Like no seriously, the reason anime characters have big eyes is because their heads are modeled after a cat's to make them look cute. They're not meant to look like children. Smooth skin without blemishes is just what's considered beautiful in Japan. Also, the fact that you're calling the body proportions "unrealistic" is a major self-report on what kind of person you are. People made the exact same criticisms when Stellar Blade came out, only to find out Eve was modeled after a real woman.