It's sad to hear some of the ridiculous conspiracy theories doing the rounds, and it takes away from what a brilliant job Rosberg has done all season. There's also no doubt that Lewis has been unlucky with reliability - although he's also lucky that Rosberg did at least conk out while in the lead at Silverstone.
Lewis has contributed a few times to his own misfortune, and cost himself valuable points - errors in qualifying, and also as I think he said himself, not always hitting his marks in pit stops. All these things add up and frustrate him, meanwhile Nico keeps racking up the points.
Having said that, the buy one get one free final race seems destined to have a say, so it may come down to Merc reliability at Abu Dhabi. If Lewis is less than two wins behind, who knows??