My WTFs? Those annoying and degrading badges and their notifications in the forums:
Earned 'First Mention’
Earned 'First Like’
Earned 'First Link’
I find the culture of the forums reasonable, grown-up , wellcoming etc. unlike some others, but those badges are the only things I consider Arch forum superior to.
Besides, I’m not being informed by email of new posts I “watch” for.
Sorry for my bluntness.
Not to forget, as well, those capital letters in some packages as mentioned above by some others.