Is it possible to be overly critical, of a game that is focused around player decision making?

Some people say that i might be overly critical of gameplay when, I voice my criticism of decision making revolving around game play. My question is this, How can i be overly critical about decision making when the primary objective to the game is this?

It's like a game of chess, make a mistake you will be punished for it and, it is the combination of the players mistakes that decide the outcome for the said game.

For me personally, if i see someone making the same mistakes repeatedly. Even after being told what they are doing wrong. I question said individuals aptitude to play this game.

Just my opinion, What's yours?

Edit: Changed "Point" to "objective"