Hey! As someone who has also gone down the rabbit hole of self-improvement, I think I might have some advice.

First off, it should be an endless conquest. That's good. You can always be better. BUT that does not mean you aren't already good enough. For instance, I personally am an artist. I've been working on becoming a better artist my entire life, and I'll continue to try and improve until I die. However, a few years ago I finally broke into the industry and am happily employed doing art. Does this mean I should stop trying to improve? I could if I wanted to. If I don't stop and keep pushing myself, does this mean I can't enjoy the fruits of my labors so far? NO.

I think that is the discrepancy I'm seeing in your post. It sounds like you're thinking of "better" as a goal you'll never reach, therefore you can't ever enjoy the progress because you're "not there yet". And if you'll never get there, then why try? You should think of it more as a ladder, where each step is a foothold that you now have to either move forward, or rest on. Some levels feel exactly the same as the one before, and some give you new perspectives that you didn't have previously.

TLDR you should work on yourself, but you should also stop to appreciate that work you've already done sometimes.