Well, considering the 3-month gap between the thread's creation and the current necro, I don't know how relevant any of this is, but here goes:
As others have said, use cover. Peek out for shots and ability use, but otherwise stay tucked away.
Also, make absolutely sure you're using both your abilities and those of your allies. All weapons have special attacks, and the biotic and technology skills are very handy as well. If you aren't using both your and your companions' abilities then you're most definitely wasting a huge amount of potential.
Also, this may seem like a silly question, but you've leveled up and put points into your skills, right? When the game launched there were quite a few people that didn't realize they could put points into their skills as they leveled (there was even a reviewer who made that mistake!) so they found the game to be much more difficult than it should have been.
As others have said, use cover. Peek out for shots and ability use, but otherwise stay tucked away.
Also, make absolutely sure you're using both your abilities and those of your allies. All weapons have special attacks, and the biotic and technology skills are very handy as well. If you aren't using both your and your companions' abilities then you're most definitely wasting a huge amount of potential.
Also, this may seem like a silly question, but you've leveled up and put points into your skills, right? When the game launched there were quite a few people that didn't realize they could put points into their skills as they leveled (there was even a reviewer who made that mistake!) so they found the game to be much more difficult than it should have been.