I'm okay with systems you can abuse. That can even be fun.
I'm just not okay with overly complicated systems.
That reminds me of a funny D&D experience in a CRPG. I wanted to abuse the shit out of NWN2: Mask of the Betrayer. I wanted a really strong character. So I took recommendations from Qt3 on what character was so strong it was almost broken, and found a similar character build on GameFAQs. I spent hours following the instructions to a T. I slowly leveled up a new character and multiclassed in the ways prescribed, choosing exactly the parts the build wanted me to. After spending all that time, I finally started MoTB, and started playing. In the starting village, there's a boss fight, and try as I might, I was never able to beat that fight. The boss was immune to most of my attacks and I could never beat him. Not even after turning down the difficulty to easy.
I just thought that was hilarious looking back. Spend all your time trying to abuse D&D rules, only to find I couldn't even get past the beginning of the game. (I did finish the base NWN2 with a bard character, but I lost my save game before I got to the very end).