I was an attendent for many years.......... and looking up and down the rows at every family that was seating there in the KHs..........
NO ONE WAS HAPPY!
Think about the "ain't it awful" mentality that the JWs present at the doors. The whole focus of the message is that the world is falling apart and Jehovah is going to fix it -- very soon....
So you're right, the whole thrust of their lives is living for a "future" reward. What is required now is "obedience" and "endurance".
Not surprisingly, the areas of increase in the JW org. are in lands where conditions really are lousy. When people don't have anything to begin with, or any hope of anything, the concept of a perfect paradise is pretty tantalizing.
Also, think of how long some of those folks have been "enduring". Most didn't believe they would ever finish high school, much less need a decent pension to live. Some gave up plans to have children; very few obtained more than the most basic education.
If they weren't unhappy to start with, they will be before long...
I was born into it. I wouldn't say that I was never happy about anything, but then personality-wise I never really fit in the org. structure. I'm an ENFP -- other than being a true natural extrovert (can't shut me up - hah!), I was a square peg in a round hole. I think it was my "P" tendencies that drove them the most crazy -- most JWs feel like they HAVE to know everything in advance.
NanaR