Then an update replaced my work.
It wasnt some 'uninstall program', but a multi-step process that involved registry editing.
I don't feel like I have control over Windows.
My friends would be like "do you want to play games?" and I'd be like "yeah hang on while I make some boot media so I can recover afterwards."
If Windows is removing another OS's entries from the boot list (displayed when you run 'efibootmgr -v' in Linux) then that's 100% deliberate anticompetitive behaviour from Microsoft; this list is where the entires like Windows, Fedora, and so on appear in the list of boot entries your firmware shows you.