Trying to get into PvP but its demoralizing.

I decided to finally go for something this season and I use to love doing BGs so been doing the rated random BG. I am decently geared but not full conquest. The ques are fine and I dont mind all that, dont even mind getting stomped on occasion. But its the team mates who just instantly start thinking their the best or just being generally rude. I had a healer tell me I was being a endless burden cause I was not full conquest. saying I am trolling cause I didnt have full conquest so they just sat there and made sure we lost.

I have seen this kind of behavior over and over and it just kills the drive to fight. I usually do decent on damage.. top 5..