[emmett]

Practicing gratitude for what you have is of course wise, and there are techniques that are helpful...gratitude journals, meditation, etc can be helpful.

However when I read your post it sounds to me like perhaps the issue is not a failure to be sufficiently grateful for what you have. It sounds like there is some desire, deep within you, that is going unmet. You have checked off everything from your list of Stuff You Thought You Wanted and yet something is still missing. It seems likely to me that that something is in fact missing.

You say "it's never enough", you "want more". But what exactly is it that you're wanting? What's the "enough" that it isn't? If you can look closely at that feeling with real curiosity and some gentleness...maybe there's a clue there as to what's going on. What's the reality that is going on (eg. "I'm often feeling deep failure and shame", a fact) vs. what's the narrative you're telling yourself ("Nothing is ever enough for me", a judgement you're making)?