Zero-kelvin is just a monster !!

Welp, I Guess I'm Still Learning New Things Myself So I've been secretly sneaking off from my usual teammates to hop into TDM to try and master all heroes in the Vanguard section. I had pretty much gotten all of them down, except one....Zero Kelvin. As a tank main through and through, I have sworn up and down, that this hero is dogshit and can't be practical in any real scenario. I couldn't believe he could be used in any ranked game mode effectively. I use to get this sickening feeling in my stomach when I would watch a random teammate slowly decide to pick him. I can't tell you how many times I've had to do double work because someone tried to bust out Zero Kelvin in a high intensity game. I thought this and so much more, until I met the #2 Global Zero Kelvin player in a match....