There was plenty of wrong with PHP. There were very unsafe defaults, poor API choices, poor coding standards, inconsistent syntax, paper-thin C bindings that didn't provide the level of abstraction you'd expect from a scripting language etc... If you've forgotten what PHP used to be you can just take a trip down memory lane by browsing through this classic: https://eev.ee/blog/2012/04/09/php-a-fractal-of-bad-design/ . Lest we forget PHP was started as a templating engine that evolved haphazardly into a full fledged programming language, and it showed.
If you think PHP is a good language today then say that, but let's not pretend that the complaints and ridicule were always undeserved.