The game that comes to mind first for me is Dark Souls. When it first came out, everyone was talking about it. My friend said it was amazing, the internet loved it, and X-Play gave it 5 out of 5--a rare thing at the time. So I gave it a shot.
And got my face kicked in. Which is supposed to happen, but I'm the type of gamer who keeps trying the same thing, thinking I'm doing something wrong--as in, I kept trying to get past the damn skeletons at the beginning. Finally did and got blown up by those skulls. I was screaming, and it wasn't until I threatened to stop playing the game that my friend finally said, "There's another path to the left."
You know how, in Dark Souls, you're supposed to slowly get better? Slowly pick things up, so that encounters are now looked at as challenges instead of "Oh dear God, I'm going to die..."? That never happened to me. My character wasn't doing enough damage it seemed like, I couldn't figure out how to level weapons, and I couldn't figure out how to use magic. I beat Quelaag, barely, and could go no further.
So I asked for help--from my friend, and from the internet. And NO ONE would help me. I was mocked relentlessly, told "It's part of the experience," and called names. I got so frustrated and angry that I threw the game case under my chest of drawers so I couldn't get at it easily when the, "Okay, maybe THIS time..." thoughts kept coming.
I eventually sold it to the dismay of many, which I kind of felt bad about because the game was beautiful. It wasn't until Dark Souls II came out, explaining how things work better and the Dark Souls community had mellowed, that I finally went back. And now I'm a pro about bought games, and appreciate Dark Souls for its glory.
However, I make it a point that whenever someone asks anything about the games, I give them all the info I can, because I don't want others to get turned off from the game the same way I was.