Thank you all very much. I'll take this all into consideration and keep trying.
In response though, People tell me alot about positioning and sneaking as well. But the problem I'm finding is that I simply do not see enemies before I'm attacked. The second they're out of the fog of war, the battle starts and I have no time to position. Also, I'm finding myself in situations where there just are no strategic positions, like higher ground, available. And even though my character is a Rogue, sneaking just does not work. The enemy FOV is everywhere, and on the rare occasions where I actually can sneak up on someone, I'm lucky if I can do any damage at all in the double digits.
I'm really hesitant to rest at camp after every battle because that advances the plot and I don't want to rush through the story so fast.
Just for frame of reference. My party is level 7 and I've just made it to Moonrise Tower. I was stuck in The Gauntlet of Shar for about a week because I just couldn't make any progress. I was only able to get through it with some massive cheese, which I hate to do because I feel like I'm missing the experience.
Thanks again for the advice. I'll keep looking around for anything that can help.