Life is Kafkaesque.
Things get harder and harder to learn as life goes on because neural pathways combine combinatorically.
Self-development as an adult looks like establishing little isolated islands of behavior and then comparing them to other ones and then throwing them away if they don't work. It's a ton of work to go backwards and undo parts of yourself to try and replicate something that should've been formulated properly to begin with.
It's not over but you're running again the clock and the clock is accelerating and every day a new baby is born that's going to get it all for free while they're kicking rocks around and having fun.
You blame a ton of your problems on "social anxiety" until one day you put together that it's not that deep and some fuckass kid yells something at you because you're walking funny when you're trying to take an evening stroll to regulate your blood sugar and clear your nasal passages.