First of all, it is incredibly slow to activate and while you're activating it, it seems that your Armor is not increased at all. Combined with the fact that it is not a one-hit kill, there is no surprise that people don't run away when they see you using it like anyone does when another Super is activated. They can just stay still, shot and kill you with zero problems.
Also, the Shadowshot is terribly slow and has almost zero tracking. You can dodge it by simply moving aside. Literally...
But the worst thing of all is the theter/suppression effect. It takes AAAGEEEEES to activate and trap someone. Honestly, I've lost the count of how many times I was 1v1, I used the Super and the other guy had all the time to activate his, and kill me before getting trapped or not getting trapped AT ALL.
When you use the Shadowshot as a trap against a wall, if someone pass close to it and activates it while he is in Super, he has ALL THE TIME TO KILL YOU before getting trapped.
Right now the Shadowshot is just a joke...
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You need an over shield once you activated. I stop playing with it because the super is so terrible.