Wall hacks/aimbot in Overwatch

So I have just had a rather interesting match on Route 66. It was a sliver rank match around 1850 sr. The red team had a widow on their team that had rather sus aim. After reviewing the replay of that match, it seems to be very clear that they are using some kind of hacks - very obvious with their opening shot.
Here is the replay code so that you can see for yourself: JDZ6JD

My question to the dev team is this; I thought the anti cheat system in place was supposed to stop this sort of thing from happening?

Greetings @DarkMira,after carefully watching replay I think it’s a good day nothing else,I am not a expert,good day/good match can have evryone.

Yeah the Moira kill was their immediate downfall. Even at 0.25 speed, it snaps to fast to even pick up lol.

You got a pretty bad player (their positioning is woeful, not able to use grapple) hacking here.

Honestly, if you’d of done what your D.Va did to kill her more, you might of won this match. Not your Moira though, they deserved to lose playing like that .

I could also judge their Mercy player… but it’s just what they do for SR.