Wow. I’m satisfied with my size, but I’m an inch taller and weigh 100lbs more than you. And no, I’m not on anything more than creatine.
There is no point training like a powerlifter if you aren’t trying to become a powerlifter. If you just want to be big and muscular then most of your training should be higher reps (like 8-15). You can spend a month of two working with heavier weights and less volume to get stronger and prevent hitting a plateau on the high rep work, but doing 5x5 as the base of your training is not going to get you the results you want.