EDIT: Added soft- to the title, since it was pissing people off. Maybe I’m still wrong. Idk, it’s just a meme.
Misuse of bricking aside—I’ve never had an issue with installing GrapheneOS. Never actually used another degoogled AOSP-based OS, so can’t compare it, but I’d definitely say GrapheneOS is at least very “normie”-friendly in terms of being easy and intuitive to use, and simple enough to install so long as you know how to read and are capable of following instructions (which I’m aware many users are not…)
Well, GrapheneOs is a bit easier. GOS uses a WebUSB installer, which does a lot of the work for you.
LineageOS requires things like ADB and Fastboot. In my case, however, it was a Samsung device, so I had to install Windows and then mess around with Odin.
I also ended up soft-bricking the device by trying to sideload the OS before it had finished downloading.