I’ve been experiencing really high latency today on Overwatch 2. It was fine three days ago. I use an ethernet cable so no WiFi issue. I tried messing with my DNS and clearing it, but that didn’t help. Prioritized OW 2 in task manager. Turned down graphic settings. I don’t know what to do, but the jerky lag is unbearable to play with. All of my other games are working perfectly normal. Please help 
Hello AKindSniper,
Thanks for your message.
This is possibly a routing issue. If available, you can try a different connection, using some 4G and/or a vpn.
If not done yet, you can try the steps of this following article :
If you don’t see any improvement, please submit a ticket with your diagnostic files and a PingPlotter test, our teams will be able to do some checks.