Oooo can I join in? I'm 29 and 3/4s! 
Aside from my relationship with DH, who I have been with since I was 18, I struggled in my early/mid 20s. Worked jobs I hated, didn't have meaningful friendships, lived in an area I didn't like. Now I love my life.
I'm about to turn 30, I got married a few years ago and I've just finished maternity leave with my first baby (toddler. gah). I've just started to return to work part-time; I'm feeling very happy that I am self-employed and WFH as it means I can work flexibly and we don't need formal childcare.
I feel very lucky with relationships. DD is the best (PFB alert), I have a strong relationship with DH and I love and cherish my immediate family and close friends.
We now live on the coast and have renovated our home. After a few recent chats with friends who would like to move to the area but can't since house prices have gone up, I'm feeling incredibly luckily. It's not a mansion, but we could happily stay here the rest of our lives and we could have it paid off in our 40s which sounds very appealing.
That said - this last year has been hell on earth at points. I've been ill, suffered bereavement for the first time and becoming a mum just as the pandemic started was terrifying and so lonely. But I feel like we're finally coming out the other side of it now and the cloud feels like it's lifting.
So yes, I do feel like life has treated me well. But I do also think that I have spent quite a lot of time in my early 20s thinking about how I wanted to design my life so that I could enjoy it as much as possible, rather than just going along with unhappy circumstances (I know that's a privilege to be able to do btw).