I think your second point is unfair. It has nothing to do with Ruby but the fact a lot of people are joining the platform. It takes time for them to understand how everything fits together. Most experienced developers I talk to are actually appreciative of Erlang. Elixir also helps a lot since it points developers to use the Erlang libraries instead of wrapping them.
But mostly you shouldn't expect people to grasp functional programming, concurrency and OTP when they are just getting started.
But mostly you shouldn't expect people to grasp functional programming, concurrency and OTP when they are just getting started.