Aye, it’s a fucking shit show alright. Hide the cables behind some low wooden shelves under the TV and put all the devices on those shelves (drill holes in the back of the shelves for the cables to go through). Otherwise stick that big black hairy god-awful pimp carpet over the whole lot of it and velcro it to the wall. Also, you need to get a good plasterer. That back wall is a fucking disgrace.