High DPI video problems

Hi guys,
I’ve got problems with my highDPI display. It’s a new laptop (LenovoT15) with fresh installed Manj. Cinnamon.
Graphics card is Nvidia GeForce MX330. Drivers are proprietary.

The scaling works fine on most of the settings, but as soon as I go higher than 2048x1152 (recommended 3840x2160) the browsers are pretty sluggish, videos slow, impossible to watch anything even remotely nice.

Is there anything I can do? Any help appreciated.