Does life really get better with time?

To all the adults here, people often say, "Hang in there," or "You're still young; there's so much left to experience." But is that really true? Did you find the romantic partner you hoped for in your 20s or 30s? Did you land the dream job/company or achieve the career goals you once thought of? Were you able to overcome your struggles and rise above them? For those who did, life must feel rewarding in some way. But for those who didn’t, how do you keep moving forward? Looking back, does your life align with what your 15 or 18 year old self once dreamed of? And if not, what advice would you give to someone still figuring it all out? Would love to hear your thoughts on this!