There are valid reasons to not like a language, PHP being the easiest to pick on:
https://eev.ee/blog/2012/04/09/php-a-fractal-of-bad-design/
As for the people using the language, I have inherited a few PHP projects, and without exception, they are a mess. The code quality and readability is usually garbage, simple stuff like tabbing and consistent variable names. SQL Injection vulnerabilities, and XSS issues abound.