I watched the Sky post race stuff last night...The interview with Toto, before the team de-brief...He was furious at Rosberg. he put the blame squarely on him and so did Lauda.
Rosberg was NEVER in front at any stage of that move, Hamilton left him room then took the racing line on exit when Rosberg was nowhere near getting getting past him....
And Hamilton explained his reasons for wanting to retire pretty convincingly in a post race interview with Pinkman... It made perfect sense and didn't seem like he was just having a sook and wanting to park it.. He's already behind on engines compared with Rosberg, and had a damaged car that he could not drive fast enough to pass anyone.. He said that even if the safety car came out (Mercs reasoning for keeping him out there) he wouldn't have been able to make any passes on cars in front... He didn't see the point in thrashing an engine he may need later on in an important battle, to not score a point in Spa..
Pinkman said that's some calm thinking under pressure, to which he promplty replied 'I wasn't under any pressure driving around at the back'