Some games have huge lag after installing Windows 11

After installing Windows 11, there have been a few weird problems with my laptop. Some small things, like losing the ability to adjust screen lightning brightness and resolution for games, are annoying but manageable. However, a major issue is that certain games such as Street Fighter 6, 2XKO, Brawlhalla and the indie game Drop Duchy suffer massive graphical lag, to the tone of running at what feels like two or three frames per second. Navigating menus is time consuming, and matches are completely unplayable. Simultaneously, other games like Awesomenauts, UFO 50 and other simpler games seem to not be affected, or at least affected to a degree that I don't easily notice.

My system specs are as follows:

Computer model: ASUS TUF Gaming A17 FA706IU\_FX706IU

Processor: AMD Ryzen 7 4800H with Radeon Graphics (2.9 GHz)

RAM memory: 16.0 GB, speed 3200 MT/s

Graphics card: NVIDIA GeForce GTX 1660 Ti

Windows specs: Windows 11 Home, version 25H2, OS-version 26200.7462, installed 2025-12-06

I've installed the NVIDIA app and updated with the latest drivers. I currently have GeForce Game Ready Driver version 591.74, released 2026-01-05. They also provide a driver aimed at using graphical programs for working with illustrations and videos, which I haven't downloaded.

I know that my computer isn't new, but I don't think it's old either, and everything worked until I got Windows 11. Does anyone have any idea what can be done? Or is this an age problem and I should just get a new one? Thankful for any input!