KDE plasma freezes all the time

mhwd -l output:

> 0000:03:00.0 (0200:14e4:432b) Network controller Broadcom:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
   network-broadcom-wl            2018.10.07               false            PCI


> 0000:02:00.0 (0300:10de:0863) Display controller nVidia Corporation:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
           video-linux            2018.05.04                true            PCI
     video-modesetting            2020.01.13                true            PCI
            video-vesa            2017.03.12                true            PCI

-Pietari