There were other factors. Frustrating work, frustrating relationships, social anxiety. But the biggest factor was that I played a _lot_ of those games for 10-15 years. Starsiege Tribes, Unreal Tournament, Counter-Strike.
Severely limit your playing, if you can. I was addicted, so the thing that worked for me was to quit completely. Every time I had the urge to play I just did a quick mental inventory of my AF symptoms.