If you consider difficulty increase in the way that happened to bitcoin then you can expect that in the future it will be so hard to mine coins that you would be lucky to get one in a day/week/month.
This is a feedback system and as far as I see it it's working as intended.
We can't all win indefinitely. It doesn't work that way.

To make it more "rewarding" for more people for longer it might be worthwhile to change the algo to reward a coin per game instead of 100 and change the time to a shorter expected blockfind time. Even then if the coin gains in popularity it will become difficult and frustrating for people at some point. That is the way it goes.