Still getting lagged out of games

I’ve contacted my ISP and they have said my connection is fine.
My download speed is 28.46
my upload speed is 7.54.
I have 0% packet loss.
Latency is 53 ms

I own the ASUS RT-AC68U and have no problems with any other game. My connection is flawless in MCC, and I have never experienced lagging out like I have in this game. Someone with more knowledge on this please enlighten me on what’s going on, because I HIGHLY doubt MY connection is at fault.