There's a big difference between demographically challenged, and underrated.
I personally think Panzer Tactics is the best game in my collection. Followed by Steel Horizon, Advance Wars (both) and Age of Empires. Then again, I'm 46, and I simply don't get excited by the same things that rock a teen's boat.
I don't hate Final Fantasy 3, it's clearly a good game, I just don't feel like playing it.
But I am demographically challenged. I KNOW there are going to be more sales of a Final Fantasy title, than something like Panzer Tactics no matter if PT is good or not.
Now, if a demographic that ideally should LIKE a game, pans it, then the game is being potentially underrated.
And just saying a game sucks simply because the person doesn't like that style of game, essentially invalidates the reliability of their opinion.