If you aren't enjoying it anymore, you probably shouldn't be playing any longer.
I didn't advocate playing only for the sake of making money. I suggested it because of how complex a game it is. How much time it takes to master. And because the potential rewards once you do are quite significant, which is a nice added bonus.
And I'm not sure when you stopped playing (pre black friday?) but I don't think there's a single point at which I've ever stopped improving. I know many heads-up professionals as well and not a single one of them ever stops learning and improving their game. Stagnation in poker is death. As such, I don't know why you feel like it was a lot of fun at the start but lost that later on. There is always another level deeper you can go.
The point of any game is to win. The metric that determines the winner of a game is different in every case. In poker, it's how much money you're making. But that doesn't have anything to do with the game itself. It merely depicts how well you're playing.
Learning to maximize expectation with true mathematical finesse while factoring in accurate opponent profiling and gameflow is one of the most challenging things I've ever had to do gamewise. I've played chess since I was 5, Counter-Strike very seriously for five years, WoW for the first 3 years before it went to shit, and have been getting into Go. And in none of those games have I achieved the level of mental satisfaction as I have from poker.
Edit: Was your stars alias RRiccio as well? Were you a cash player? You only have ~750 tournaments recorded on sharkscope.