Amazing, i 've red the posts in 2 first pages and none gave an answer to the poor poster about the people that play wow...
Dear OP the wow community these days is spoiled by the company that is catering to their every need such as
1) Insta gratification. In this game it is a crime to lose.
2) Epics in a silver platter. In this game colour white is deleted from the game. Colour green is for leveling, colour blue for leveling and the first heroics of a new expansion and colour purple the colour that all should have in every slot so we can all be happy.
3) Auto tools, name changes, faction changes, realm transfers where the means that blizzard tought their customers that they can be total douches and get away with it just fine. In fact it became part of certain customers daily fun to troll, insult or flame their fellow players.
But to acuse the raiders for this is unfair.
Raiders in this game, is the only (pve) segment of wow population that strive together with other like minded people to achieve smt in the game, for whatever reason they might have. You will likely find that the douches are less represented in the raiding population than any other group of people in wow.
Dont classify running previous expansion content, as raiding.
Raiding should be a team activity, that wipe is expected, in fact an activity that more wipes than boss kills are expected. It doesnt matter the level of skill of the team. Or the content.
Only the outcome (more wipes than kills) and the knowledge that this is raiding and not 1 shot facerolls.
Your group was formed by people that went there to oneshot everything without paying attention to mechanics, and that isn't raiding for sure. It is a team activity, but no it is not raiding.