It seems like it would be hard to control for the obvious feedback loop: Are children less successful when their parents are predisposed to lower moods; or do parents’ moods reflect their children’s achievements?

Don't have much commentary on this as I don't have children, but this video is very relevant.

Jordan Peterson - Why not just be Child-free and Happy? https://www.youtube.com/watch?v=in4sDT9__0I

I have children. That video gives quite a good perspective on life, using having kids as an example.

But then who is he to judge? If someone want's to bum around all their life, not do or achieve much. Enjoy having lots of rest time. Watch Netflix, etc. Why not?

I've never seen any evidence or quote that made him sound like that; not even a quote taken out of context. It'd add to this discussion (and to my personal knowledge for that matter, I keep hearing this repeated but nobody ever says why) if you could give us an example.

The mods are probably enjoying their Thanksgiving, and the discussion likely won't be substantive or thoughtful. It would be a nice gift from us to them if we'd just avoid the topic.

He has refused to call people by their preferred gender.

His opposition is largely against legislation forcing people to use people's preferred pronouns, which is a position any defender of free speech should agree with.

Should we stop studying Teichmüller theory too? Or do ideas stand on their own?

Oh wow. I didn’t know the answer to hatred was hatred...

To be more explicit, the answer to unjustified hatred is reason. The parent poster does not put forth any argument.