Reddit is quite possibly the worst place to look at for any sort of advice or to form an idea about a community. The majority of people who frequent reddit are usually banned from the official forums for toxic behaviour.

Not to mention the glorified circlejerk, where if you say anything that goes against the general knowledge even if you're right, you will be downvoted into oblivion so no one sees your post and whatever you post after will also be downvoted because they now hate you.

Every single instance of people being "toxic" in this game is almost always someone getting upset because they are called bad. Just now i had a tank get triggered and leave because i said and i quote "You can pull more than just 2 mobs at a time", also called the tank out for moving extremely slow and looking into every nook and cranny of the dungeon while having every single class at lvl 70, right after telling me how toxic i am.