I've found ESO to be pretty challenging from the beginning. After reading and watching a lot of videos, I respecced my templar from S&B/heavy to destro/resto light. I had success with that for several levels up to VR1, then the patch came along and I don't know if it is the nerfs to impulse and biting jabs or not, but I'm having a lot of issues with groups of mobs. I can make through most single boss fights OK (even harvesters), but facing groups is tough for me.
If my ultimate is up when I start, I'm fine, but if not I can expect to finish with 1/4 health and little mana left. If I pull extras I'm dead. I have similar issues when I am up against named duos or trios. These are just regular mobs, too -- not veteran. I'm still finishing up the main story line.
Advice appreciated.