Definitely don't appreciate the conclusion that I just know unhappy people. As I mentioned, I don't think having kids has anything to do with it.
I said you just happen to know unhappy people, not that you only know unhappy people.
I’m bored, starting at my phone while my kid snacks or does activities… so yeah
By that metric I could say the same of literally everything I do in life. Being bored at times is just normal... Meanwhile I go outside with my son, race down the street, or just kick a ball, and watching him laugh isn't boring at all. YMMV.
Bored and giving up side-projects are two different things. I did give up side-projects after having my son, but it's far from being boring.
As for the job thing... I guess you don't frequent that many people with kids? Or you just happend to know unhappy people? I've changed jobs 2 times (well, 3 if you consider COVID related job loss) since my son was born.