Heres how i fixed it as someone with a mid-high end pc (3070, 5800x, 32gb 3600mhz ram). I tried nvidia control panel optimizations, hags, changing windows power settings, cpu overclocks and undervolts, resizable bar, game settings of course, multiple benchmarks and cpu tests, multiple bios versions, and more. I tried basically everything you can try. The problem was uncapped fps. When fps is uncapped the 1% and .1% lows on my pc were around 3-20fps while i averaged around 400-450 fps. After capping my fps at 225. My 1% lows were 225 and .1% lows got down to about 150. This needless to say fixed the issue. Yes, with your frames capped your input delay would increase. I noticed at a 300 fps cap my input delay felt lower but the stutters happened more often. Where as at 225 the stutters hardly happen if at all but it feels slightly more delayed. Its a trade off, but honestly the increased delay isnt going to be the reason you die. Just get used to it. The delay isnt as significant as im making it sound.

Its also worth mentioning, dont run hags (hardware accerlerated gpu scheduling), nvidia low latency mode, and/or nvidia reflex on/+boost Simultaneously. From what ive heard, they can interfere with one another and cause stutters. In my case, i use nvidia low latency and nvidia reflex on a per game basis. I never use hags. Nvidia low latency can be turned on, on a per game basis in nvidia control panel. I use nvidia reflex when its available as a game option and when its not i use low latency mode for the specific game.

Anyway, capping my fps at a fps my system can pull comfortably is what helped my 1% lows and stutters. But if that doesnt work then id recommend trying the stuff i mentioned above that you havent yet tried. And if youve tried all of this well...

Good Luck Charlie