1. Too much chaos breeds too much order. - I think JP means, giving too much freedom means, the young adult will be set in unhealthy ways (junk food, video games) ultimately leading to too much sameness(order). Order has a negative connotation here afait. Alt take - https://www.reddit.com/r/JordanPeterson/comments/cbx21s/it_is_rational_i_think_to_assume_that_too_much/

2. Having a male progeny meant more exponential propagation of genetic material. How?

Refer to Genghis Khan example. Back in the day, he argues, man could end up with more progeny than women, since the woman would have say 9 kids with the man, and the man could have 2 mistresses with 2 kids each leading to 13 vs woman's 9.

3. What is an example of ineffectual engagement?

Dad arguing with son that its bedtime leading to stress and delaying bedtime.