This is not just something with this game, but with society as a whole. During late 20'th century and upwards it has been an increasing attitude in a lot of different countries and it reflects itself very well in a video game. People tend to focus on themselves. (mind you, this is how people are raised in the western world)
Now, the problem where I see it lays is with the development of mmo's. With World of Warcraft and various other games you really tend to see people focusing on how themselves play as they can just leave a group etc. if they don't like the progress. Once you have accomplished something though, you don't always remember that you had a learning curve yourself and lash out on people who don't do according to their taste.
In other words: Much like real life games have for a large base of players gotten "monoable". You don't need to help other players and thus you find it tedious when you have to. I am one of those players that played a lot once mmo's where new and have gone through some of my learning curve, but this in turn has made me only want to play with people I know and ignore others if I don't have to interact. Dealing with the lashing is tedious just as you are saying, and more often then not not constructive in order to play better and it might also not be the source of the problem.
- Exerio