Not sure what exactly changed by fps dropped down significantly even though settings are the same (and video config is in read only mode).
To give you an idea from stable 140-150 it dropped all the way down to 80 even at the start of the game
What do you mean ?.
I tried all sorts of settings in video: fsr2, stretch and fsr, different % scale and all...fps was just halved from what it used to be 2 hours ago prior to update. Horrible patch valve, game actually became unplayable