Life is just surviving in your 30s and so on?

I'm not 30 yet, but i do think you're being a bit pessimistic there chief. Perhaps what you don't find interesting in life, is the real problem. If you don't find any of those things interesting enough, try going on in your life without them for awhile, see if it "bumps up" the appreciation for those things. Your life in your 30's, is supposed to be about enduring and providing, so that you can sit back and relax later on. You can watch your kids make a family of their own, and grow old.

Life is what you make it, not just a drabble of seemingly never-ending and boring tasks...

I am still learning new things at 85, youngster.

Life is just surviving in your 30s and so on?

~~~ What juvenile blindness and vanity!
Sooo typical! What are you, 16?
Someday, waaaay in the bad old future, when you are in your thirties, you will laugh at your juvenile vanity and blindness.
If you live that long, you might have grown a real life!!
As for the rest of your question, it's just too silly and thoughtless to warrant response.

Why do you generalize by saying everyone in their thirties must be unhappy and merely surviving? You must be the most boring person on the face of the Earth if you can't find pleasure in life.

Why do you keep saying "you," and "your?" It's not MY life you are describing. Many exciting things have happened in my life since I was thirty. I've gone through several professional career changes, amazing trips and adventures, started and failed three businesses, raised kids and working on four grandkids, sharing THEIR lives and adventures.

Not doing anything interesting? Try swimming with sharks and dolphins. Try mountain biking and surfing. Try exploring a new city on foot. Catch up with the youngsters? Hell, most are still eating my dust and I've been retired for a few years. This coming weekend I'm traveling to gold country, in the Sierras to try to catch a hawk in my camera's viewfinder. If I'm lucky, maybe even an eagle. If I don't manage either, well, it's not even Summer, yet.

It's a cliche' but my advice: since YOU don't seem to have a life, then GET one.

Career advancement isn't the only goal in life. Education... learning skills... perfecting talents...

Why is it in this culture, we put SO much emphasis on youth? It's supposed to be amazing to get to be old, since it was so hard and rare to. These days, you hit 40, and people think that's it.

That's not it! Ride a bike, and learn to fix it... become a master at it! Write a book! Learn some recipes... take a dance class. Open a flower shop. I work in a gym during the morning shift, and most of my clients are retired... and seriously? None do nothing. They travel... exercise... do volunteer work... have hobbies... heck, one takes Karate, Tai Chee, and plays the fiddle!