I recently introduced a friend of mine to WoW and because she wanted to heal and was afraid of messing up I took the role of the tank during our leveling experience so she could get used to it. In hindsight it was the right thing, not because healing itself is very hard but because people do make it hard. There were a lot of DPS pulling random mob packs during the leveling phase and then yelling at her for dropping below 50% hp (even though they most of the time did not die, untill I told her to stop healing them) and trying to kick her for being a bad healer, she really wasn't.
It was mostly DPS who were far below me in dmg, completely decked out in heirlooms these people couldn't do a damn thing right. They were backpeddling, often were dps in blood presence and some other nice things.
A great many people on this game are pseudo elitist douchebags who get a thrill from trash talking other people whom they deem below themselves despite the fact that most of them have nothing whatsoever to actually base their contempt for new/players the think are bad on. It's the whole 4-8k achievment baddie crowd with their 300 arena victories never having been able to break 1550 on any bracket and an RBG rating of 1,1k.
It's the same with the people feeling the need to camp low level players, often for hours, loling and spitting at them. These players are driving out new and old players by making their gaming experience horrible. Blizzards stance on this occurence alone is beyond retarded, pretty much giving free reigns to people who are usually A. bad and B. don't care about the game and community at all.
I always laugh when these people tell others to get off PvP servers and "deal with it", because it is the exact same bunch being douchebags in random dungeons/lfr and other places. They are not high rated PvPers, often they hardly do PvP at all having somewhere around 50-100 PvP achievments at most, never actually made it to 1550 arenas or RBG's these players get their kicks from being sadists against those who can't fight back.
Being told by some 300 arena victory scrub who never achieved 1550 when I am currently around 2,3k that obviously I ought to do PvE and get off a PvP realm because I disagree with their stance of tormenting low level and new players for hours is completly ridiculous but shows very well why it's so hard for new players to actually get into the game.
These people are destroying the PvE community, they are wrecking PvP players killing off badly needed new blood by bullying them out of the game and in general do the game no good. Sadly it's exactly those people that seem to get what they want because they cry the loudest on the forums.