This is the Developer's Release. It's for developers. This release of Debian is what was hashed together to test the Beta boards. There are major holes in the packages that are provided. The whole point of this release is to get the board out to developers who can fill those holes and find and fix any problems with the distribution, while they feed back any difficulties found with the hardware, in case changes need to be made in face of hardware and configurations that the designers had not tested.
It is expected to be slow and buggy. It is expected to come with no documentation. It is expected to be as user-friendly as a cornered rat. It's for developers.
The fact that you have bought it expecting something else is nobody's problem but yours. If you are willing to be a pioneer then stuck around and we'll give you some pointers and use you to to test stuff. If that's not what you want, the door's to your left. Feel free to eBay the Raspberry. (At the moment you'll probably make a profit.)
the normal switch on and do something type of hardware is not one of them
You mean like your router, your telephone and your television?
None of them require you to learn a new language before they can be used.
You've spent something like a decade or more learning Windows. Have you ever seen anyone encountering it for the first time? Anyway, Linux is stick-shift, not a hovercraft.