> If I were to summarize it with one anti-pattern, it's that PHP encourages people to mix unrelated parts of the program into one place, making testing, maintenance, and understanding nearly impossible.

Haha, you are actually the problem you complain about.

Half assed "developers" who try to build anything large scale with WP or Joomla, people who can't be bothered to keep up with the changes that happened in the past 5-10 years but still complain about how shitty everything is.