Well he IGLed in Virtus for a while but stepped down of his own volition if I recall correctly. Mixed results
Yeah Flusha was fnatics IGL and just like Snax he wasn't too successful either, not awful but just not capable of bringing out the best of their teammates. It's kind of the same dilemma as in sports where the best players are almost never the best coaches.
The player perspective is problematic because your individual perception and capabilities are unique to yourself and when you expect others to perform to their fullest underneath the same conditions they fall short. Brilliant gamesense players don't tend to make the best IGLs as a rule of thumb, it takes a more team oriented mindset where you can freely dissociate your own needs and understanding from the needs of the collective