Xenom is not bad, he plays his role well, he actually has the highest assist and assist per round, he is also a shooter just like cortezia if you have watch mibr on stage 1. However due to the nature of xenom's role, he is not given any chance to actually shoot his gun, controllers are supposed to be the last person to die, cortezia on the other hand plays lurk and first contacts that's why has more highlights and morale while xenom is left behind the curtains.
Xenom is good, he just needs more experience on the role, more confidence just like how Som plays smoke, a controller who closes rounds.