This thread isn't really mainly about flashpoints, operations, heroic mission, or anything like that. Although, you should know why after you've read this thread.
When I was doing a flashpoint in Athiss, I had two roles (tank and damage).
The group members left because of me since they were all so tired of losing. One of them said something like "dude, you really need to have a shield" or something like that.
Please, keep in mind that I returned playing SWTOR about 2-3 days ago. Thank you.