It’s been getting worse with every patch and it’s only Overwatch that does it. I’ll have frames drop or have a .25-2 second window where the game locks up. My primary fire will get stuck on. There’s nothing wrong with my system or mouse since this is exclusive to Overwatch 2.
I have an Intel core i9-14900HX 2.2 GHz
32 GB of RAM
Nvidia 4090
165fps (matched to the monitor refresh rate)
30-60ms latency.
I have a similar problem, I will try to translate because I am French and this problem is not mentioned elsewhere. My game lags at times, very slight lag on some games. But the worst is that on some games my game seems to no longer respond, my character stays in the position where I told him to go, if I go forward he goes forward without me touching anything, and the skills are blocked during this time. It happens from time to time and it remains annoying
do you get the orange icon with the lightningbolt whenever you have the stutter? because thats what im getting since around the 17.12.2024 (since 5days) its driving me crazy
Sometimes, yeah. 
Try changing the render scale setting to manual 100% and framerate to manual 120fps to see if the game still locks up.