I used CyanogenMod (LinesgeOS) in the past on older phones, but it is not for the average use to download, install and configure all the bits and pieces needed

I used CyanogenMod (LinesgeOS) in the past on older phones, but it is not for the average use to download, install and configure all the bits and pieces needed for this. The support for the phones is also very limited, half of the phones in my house are not supported (and they are manufactured by Asus, not by a very small manufacturer).