Terrible brightness range and inverted brightness buttons on integrated display Endeavour OS

The integrated display cannot go over above 50% brightness and buttons for changing it are inverted. I believe this is a well-known issue on HP Victus laptops - but it was never solved, not in the slightest. So I wonder if there is any idea to do something about it - I believe it is not EOS specific issue, as it persists on pure Arch and Ubuntu - is it possible to lock brightness on a hardware level? Or perhaps any workaround. Any help appreciated.