Faster startup, faster start of games, software etc, YOU control the software not otherwise around, installing and removing software is 1 button click ( not 100000 clicking through yes i read tos that i will never read ... ), installation of software is quick, modern Desktop Linux distros really do not require that many terminal usages, FULL customisation of your desktop, windows, easier custom with quick one click installation and one click removal of course ( because on windows they just throw another "Hey you wanna use our other stuff" and still need to click through 5 clicks just to remove it. ), You dont need a itchy tpm2 chick for your encryption of hardware and its not required for installing basicly the OS, you can pack your software into virtual environments ( Flatpack or similar ) so that some software, e.g. Chrome doesnt have FULL access to your pc that they REALLY do not need, switching OS from linux to another linux distro is super easy because of the easy installation of apps, extensions and all that can be saved to a file and just installed from another distro, you can choose what to upgrade ( no more FORCED windows updates or suprise updates ), sometimes you screw something up in your OS on windows you would HOPE there is something written on the internet, on linux you can just plug in your live boot linux distro USB stick and then you can fix directly what you or some application broke. ( never happened that my distro just "broke" ). On many distributions there is already integrated backups, that incrementally saves your data, the compatibility with everything is just great, even virtualisation of windows is better on linux then windows to linux, there is a lot of options for communicating between devices ( for example files ) and there isnt really a monopoly by one drive by microsoft, everything on linux is less "corporized" so less ads on your desktop, less bloatware, YOU own it, not the CEO of microsoft.

Of course i see you there already:

"BUT windows didnt do anything bad...."

They screwed windows users already BADLY, for example they "accidentally" install a HP driver software FORCED and without knowledge, they installed/recommend 3rd party apps/websites on a fresh install of windows, that should NOT be on a pc that YOU own and didnt wanted ads. The bloatware that comes with windows, for example one drive, edge and microsoft store its just slowing your pc down, and after few updates your rtx 4090 TI pc feels like GT 460 pc because everything needs to run in the background.

In summary:

YOU own and controll your pc with linux, less bloatware, more customisation and less corporation spam