Santiago124: I cannot help but say that true to the real sport, better equipment has a major role in higher performance so no matter how hard I try , without upgrading my set, I will remain as an outlier in my Tier.
I disagree with you here. Yes, the better equipment can make you a better golfer but if one doesn't manage courses properly, it's all for show. Where one golfer can stop a ball on a dime, another might have to roll up to that point. One is much easier than the other but the result is the same if done properly.
You're handicapped a bit because you don't play a lot but you definitely have decent equipment. You might consider trading that HB out for a 60 degree wedge, though. This will help you get to shorter putts and more GIRS. I think you're better than you're thinking, you just need to play smarter than the other guy. ;-)