Some days ago, I wrote a text that is quite related to the one you did, because I really feel like I'm on that cycle again.
Yes, I think that this feeling that we, developers, have, is this anxiety to always be better, specially if not only, to ourselves. We always search for more knowledge, and always think that what we know is not enough. But as you said, sometimes I've felt that It was just only me, but reading Dev.to community made me feel not lonely in that matter.
And really, thank you for sharing that with us!
In case you are interested, thats what I wrote about this topic, in my point of view: Trying to be a real Dev
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.