While not one click, GrapheneOS is fairly easy to install (series of clicks on the phone and a web page), and does not require digging through forum posts. How

While not one click, GrapheneOS is fairly easy to install (series of clicks on the phone and a web page), and does not require digging through forum posts. However, it is based on AOSP and only supports relatively recent Pixel phones. Also, like all non-Android/non-iOS phones, some apps may or may not work on it. Depending on your phone use case, this may or may not be acceptable.