I don’t understand much from this article 
Conclusions: The relationship between subjective happiness and functioning in schizophrenia patients was influenced by level of cognitive impairment.
The more of a cognitive hit you’ve taken, the less happy you feel.
Yes and no. There are definitely a few users here who are too dumb to know that they’re dumb and they make everyone else crazy posting obviously deficient crap that they’re unable to see the issues with. They do seem content in their own way and I suppose that part of it is good.
I think even a lot of normies are like that too. Common sense is a very uncommon thing and I’ve learned to be more tolerant of people’s madness as I’ve gotten older. As John Cleese says, after you reach a certain age you eventually realise that the world is nothing but one big madhouse. Although in my opinion all the nonsense that fed to people through the media these days doesn’t help matters.