Hmmm interesting point, i guess as a new player i'm stuck in the 'OMG open limping is the devil' mode of thought, when clearly it can be useful given the circumstances. I guess my goal with these players on my left is to play a lot of 'implied odds' type hands and let them call off my value bets when i hit. My issue is when i don't hit it becomes pointless to cbet when you know you're getting called and it's very difficult to narrow their range. So it becomes a balance of choosing hands that are likely to play well postflop. If that makes any sense whatsoever lol.

Your last point is where i struggle the most. I'm by no means a good player but i do find it hard to outplay these morons when their range is so insane.