Don't give up. Keep at it. As others have said, finding a group to keep trying with would be best. That way, even if everyone is learning at first, eventually you'll all get it and finish. With PUGs, you'll almost always have some who are new and learning, and eventually you give up on that run and never see them again. If you have to do a PUG, you will need to start getting more selective in your group. LFM Titan HM, primal weapon or better, full DL, must know fight and have exp in phase 5. Something like that. Basically try and find people in the same situation as you.