This is a competitive game, not "Care Bears Play CS:GO" or some Disney movie.
Do you really think Man Utd or Barcelona would bring back a washed up, poor performing football player just because of nostalgia and the fact that he's still friends with the active players? Of course not.
f0rest, GTR and Friberg can still be best friends outside of the server. In fact, NiP can even pay Friberg to be their "ambassador" when he retires and becomes a full-time streamer, but he is nowhere near good enough to be on a squad that aims to be top 5, let alone #1. His performance at this event proves that.