[2020] Game started lagging

You don't have a proper video driver installed for your nVidia card:

Card name: Základní grafický adaptér Microsoft
Manufacturer: (Standardní typy zobrazovacích jednotek)
Chip type: GeForce GTX 1660 Ti with Max-Q Design

Please install the latest one from here:
Download Drivers | NVIDIA then reboot.

All the best!