All those features used to be usable even without their shitty software, as every configuration was stored in the mouse, as it should be.

The mouse was usable on every PC without the need to install anything, you had to configure it once and you’d be fine.

Logitech made the shitty decision some years ago to completely rewrite their mouse management software, so that it must be installed to use the main selling point features of the mouse. To be honest they left a way to store the configuration on the mouse, but they made it harder to find, configure and use it this way.

All this is a deliberate choice by Logitech to worsen the user experience just to gather your data.