No one "deserves" to win the game at this point, be it Derrick, Donny, Frankie, or whomever. If you get a powerful target on the block and eliminating them improves your chances of winning, you're a damn fool if you don't eliminate them. Between Donny and Nicole, Donny is currently the bigger threat. Nicole's head is not completely in the game so she's easier pickings. Donny is all about keeping TA together if it means saving his ass, but should he win HoH, do you honestly think he doesn't target Derrick and/or Frankie to improve his chances at winning? Anyone who believes that is not bright.
Donny is the obvious choice to go. The way Derrick has played the game, I would think he'd understand that. So if Donny "miraculously" gets the votes to stay this week, I'm calling BS and believing production has taken an active involvement. At that point, this is no longer a game, just a staged production. If I want to watch something with a predetermined outcome, I'll stick to pro wrestling.