You're asking for a dedicated server, a special select people being god mode with weapons disabled, and im sure more. That takes a lot more resources and time than you think. Especially when they have a lot of other things going on that are higher priority.
I do agree that some people aren't the friendliest to a newcomer. The tutorial is just there to help you understand the basic function of the game and honostly, I think it does a fine job. Even if you had a trainer showing/teaching a trainee how to play, the trainee still would not learn because it takes practice, time, and an active attitude and drive to want to be better. The problem with a lot of people nowadays is that they want to be good fast and they dont want to put in the effort to become proficient. What im trying to say is, you can teach a player anything and everything you want, but they wont learn unless they have that drive.