Everyone has their own opinion, but The Last of Us was pretty good. The first ~20 minutes of the game was absolutely amazing, then it trickled off. Overall the game is really good though. I loved the sense of exploration. But your AI team mates in games aren't meant to help a lot. They don't play the game for you. They are there to assist you.
-_-
Well duh the AI supporters aren't there to play the game for you. Every gamer knows that. AI teammates aren't that great anyways, and I very rarely expect them to be as great as I am.
A good example is Operation: Raccoon City, a game where the AI hardly helps you, but they at least still fight with you. They might get one to two kills max while you do the rest, and here, in the Last of Us, I was expecting the same thing.
Did I get that? No. I get both Ellie and Tess running right into me, and actually cost me several times my life. When trying to sneak around a room filled of Clickers, they too start running around me, but because they go directly in front of me, it costs me a spot to hide, thus alerting the Clickers and getting me killed because I was either too slow to react to the Clickers coming after me, or I'm slamming my head in a pillow out of frustration.
And since you said, "everyone has their own opinion" I hope you at least respect mine that I wasn't that big of a fan of this game despite millions are and that I have reasons to back my side up. If you or anyone else doesn't see it like me, so be it. But I just wasn't that big of a fan of this game as much as a lot of people were.