CaitSeith said:
The only reason a game is called overrated is because he doesn't like it to be popular. The game's quality is secondary; it could be good, mediocre or bad. That's irrelevant, because if the game wasn't popular, if people didn't praise it, it wouldn't be overrated anymore (even if the game itself didn't change)
tl;dr: If a game is shit, call it shit. Overrated says nothing about the game.
No, you're putting words in their mouth, they mostly say it to mean average or shit. Of course it is used only for popular games, but all it means is it isn't as great as it was made out to be. It really is no different, and I really can't understand why you are trying to make it so.
Also, if you just call a game shit, it's still doesn't say much (and will still piss people off), as little as saying as it's over-rated. It's always preferable that they explain why, which should be the only focus on their post (not which words rub people the wrong way).