Is GNU bloat?

Hello,

I know many basic Linux commands like ls, cat, sed etc. are actually GNU programms. That's why the correct name is GNU/Linux. Now this website here says (https://harmful.cat-v.org/software/) that many standard Linux programs are harmful and it offers some alternatives. They mention some GNU programs and say that GNOME and KDE are so useless they aren't worth having an alternative. They also write OOP is a harmful thing and Firefox is bad. Well Firefox is preinstalled on most Linux distros so I don't quite understand their criticism. At the end of their article they say: Quote:

At the moment a detailed rationale is not provided for most of this, so figuring out why some things are considered more or less harmful than others is left as an exercise for the reader. Here is a hint: complexity is the bane of all software, simplicity is the most important quality.

Could someone explain this to me? At the moment it just sounds like some unfunded and outdated criticism...
Should I replace the listed software with the mentioned alternatives?