Personally, I have a love/hate relationship for new players. I love that new people are playing and learning the game. But, especially for content I've already cleared 100 times, I want to clear through older content more quickly. If you are slower, don't know the encounters, or aren't geared; well, you can potentially aggravate me for existing. Having said that, there are a lot of people that meet the requirements in the new instances... it's easier to blame new people for mistakes than suggest to work as a group to clear newer content. Brayflox HM is a good example since the boss encounters have new techniques that are difficult (last boss especially)... add in the server lag and you have a bad combo to increase newbie hate.

Good luck in future runs! Find a good free company or linkshell. There are a lot of people happy to help new players.