Is there a point to self improvement in ones 50s?

I'm ready to scream in internal pain. I was just watching a video about setting up an ai as a self improvement advisor. This isn't about the ai, but more about the process of improvement coming from a good content creator.

I was reading the comments as I do, and I came across a similar troupe as I often do. Harmless in itself, but it kills me inside. "I'm 56 now, but I've directed my children to absorb what you are saying". It's common in fitness media comments, dating advice, and others as well. "I'm 60 now and I can't do, but blah blah". "I'm 58, I wish you where around 25 years ago".

This isn't cool for me. Whatever happened or whatever my problem is unfortunate. I am 54 and I have yet to achieve my life purpose. I have yet to procreate or even experiment with intimacy. I feel absolutely inferior around peers. There are only a couple days month where I feel whole, and can be assertive and raise my position in the hierarchy we all work to fit into. The rest of the days I feel like a child among adults.

I engage in learning and physical fitness. I learn better than I did years ago, and the last 5 years I've managed to figure out positive gains in my workouts after years of poor results. I'm leaning into this, but I'm 54. What's the point? Body game at 54 isn't going to help me with intimacy and eventually having a family.

The best thing I can do at this point is wait it out (or speed it up) and hope that I remember a little bit from this life when I reach the next life. That's where I'm at. There's little to do I'm too old to be taken seriously for career opportunities. I'm too old to be taken seriously by women for family. I'm too old to risk my income on a business venture. What;'s the point?

It really hurts today even though I take steps daily to grow, achieve and experience.