GrapheneOS has a growing userbase, and of course many of the people who would like to switch to GrapheneOS are extra mindful of their devices' privacy and security. Maybe a majority of those people are more technically capable, but I can assure you our users aren't all "nerds."
We (yes, "we," not hiding who I am, check my bio) have seen many users from all walks of life asking for assistance. For example, I remember multiple times newcomers in our community asking for help self-identified as old, or retired, or grandparents switching to GrapheneOS. It's not hard to use, and we have a fairly large community of people who are happy to help others learn the ropes.
GrapheneOS is easy to use, just ask the grandparents rocking it. Our userbase will only continue to increase as we continue to deliver features that people want, with the latest being Secure Paste. Many of users are very excited about the feature. More are planned.
As for the complaint about the name, okay? GrapheneOS is open source. You can change the name everywhere and build it yourself.