system
A chat on subreddit /r/pcmasterrace
human
Yup. Look up U-shaped happiness curve. 40s-50s is the age when people are the least satisfied on average. Lots of mid-life crisis shit going on then.
gpt
Assuming your socioeconomic standing doesn't change. 

I am way way way happier than I was in my 20s now that I got a partner, a home and financial security. I'm basically living my 20s on Easy mode at the moment (35). OTOH I have always been deeply thankful for anything and everything I have, so there's that.