Literally had a Mal'Ganis just 2 games ago who was able to stunlock 3 people infinitely.. Like no joke, his infinite claws ability with the new upgradable stun duration makes him potentially able to single-handedly take down anyone he hits with his stun and there is absolutely nothing they can do about it but pray that somebody on the team comes and saves them.
This is horrible design. A lot of champions have some pretty broken BS that seem pretty unfair, but being able to literally lock down anyone forever seems like some oversight that wasn't thought out thoroughly. Mal'Ganis did not need an upgrade, he was top-tier tanks for people that knew how to play him in the first place, now he can literally just win any fight against any champion (or 2-5 of them if they're grouped up enough) and there absolutely nothing that can stop it.
I reported the player for cheating, because it seems pretty weird that he locked 3 people down from full health to nothing all by himself while "blinded" but honestly, the fact that it's even possible within the game itself is pretty bad.
Blizzard, please figure out how to manage CC better. It ruined overwatch, and it's probably what killed HotS too.