Here is a typical sample of what I experience time and time again in every raid if it is new or not.

Xephatol first time for me Tuesday night. I enter and say it's my first time. Only thing one guy said was, "Not our first time." Tank and others speed off and hit all the trash groups up to the boss which was fine, typical useless trash mobs. Arrive at boss, they attack immediately and I just "wing it", trying to watch/hit/avoid what they do, learn mechanics along the way and not die myself.

The same thing happened through the whole instance. Not 1 word of pre-boss info to me. At the end I said ty and reminded them to maybe say few words at bosses for a while as it's new to help new people aclimate. I received a 3-word response from one guy, "That was obvious."

This is why I avoid any total pug groups period unless I HAVE to do content to progress. Unfortunately today, I had to do it to complete the new story. This appears to be a very unhelpful, sarcastic game population overall.