I decided to install Graphene before looking up the installation and was blown away by how easy it is. I’d been on stock android for years and was expecting a similar experience as OP describes. My very old custom ROM folder is filled with files with names like ‘confirmedsafeblob’ and ‘bricksafe’ that I don’t even know what they are anymore but speak to some past misery. Then beep-boop done with the web installer.