What do you do when the OS itself is spyware? There's a reason vendors like requires all Android vendors to install Google apps on phones, because all their app

What do you do when the OS itself is spyware? There's a reason vendors like requires all Android vendors to install Google apps on phones, because all their apps (especially Play Services) has every possible permissions enabled by default and it's not possible for consumers to disable it. Windows 10 too is ridden with telemetry and all the 'spyware options' (ex. send my keystrokes to the cloud) are enabled by default.