Taking that power strip off of THE MIDDLE OF THE WALL will go a long way.
Also lighting is what makes a room and you have none of it. Go grab a 4' Halogen Track light kit from the depot. Power efficiency < Nice Warm Lighting.
1 working power outlet in the room within range of the desk.
When I said nothing short of new drywall (And me getting off my ass and rewiring a rented house (HAH. ) ) was the only thing that would make it seriously better, I mean it bahahah