People who hold a high moral ground and think they're better fans than othrs are annoying but I think you're mistaking normal fans who are angry at gloryhunters for those pompous fans. Initially I really found posters who called others fake/gloryhunters annoying, but I've grown to realise that those members have a point.
It's ok to criticise any players if you provide valid explanations and reasoning behind that criticism/opinion. However posts like "NOOOOOOO ALEXIS FUCK OFF!!!!!!" or "TITO WTFFFFFF NO TELLO!!!!!" or any one liner about how player x sucks, are anything but constructive criticism and that's why some members are angry at others.
This clubs success over recent seasons has inevitably attracted some unwanted attention and support, some people don't understand the challenges facing these players and just how much pressure they're under. These fans expect to tune in every week and watch Barca deliver a manita performance without taking the human aspects of the game into account. I mean the Tello/Alexis hating recently was just unbearable. People were shitting on these players as if they were there to sabotage the team, whereas if you actually watch the matches carefully you'd see just how much both of them try. I mean just go read some of the pre match comments in the SPartak thread when the line up was announced, those drones flying around taking cheap shots at players and Tito really are a cancer. Some people don't realise that Tito knows his own team better than them, if he's starting Tello/Alexis over Villa for example then there's most probably a reason for it, mainly because they're playing it safe with Villa. Everybody knows that Villa right now is a better player than Tello and probably Alexis, you don't receive any rep points for pointing something so obvious out. And if an opinion isn't really worth mentioning, then its best not to mention it. Some of the posts in chat during the Spartak match was just soul crushing. And as soon as Tello and Alexis stepped up those people shut the fuck up, but they'll be back next week as soon as Tello or Alexis make a bad pass.
At the end of the day all people need to do is to get their emotions under control and just put a little more thought and substance into their posts. People are taking their time to read your opinions, so don't be surprised of a backlash when you fill the forum with shitty one liners. Even if Tello and Alexis are shit what problems does bitching solve? Things in life are not so simple, a player just can't be thrown aside so easily after a few bad performances if that's the case than Puyol should have been kicked out of Barca 10 years ago.