Personally it doesn't need to be user friendly for me to use it, just have decent specs. Like at least a flagship phone from 2019 kind of specs. All the Linux phones are unbearably slow and have crap cameras and battery life.
I'm not sure Pine64 has a goal of bringing a product to retail readiness; the PinePhone was getting there, then they released the PinePhone Pro which broke a lot of the work done...
Idk. I don't have the expertise to do low level work like battery tuning or fixing audio with any kind of efficiency, but once that work is done, I'd like to help get apps ported/created.