I shouted "stronzo" a lot of times at the screen during the episode (I feel like nothing beats cursing in Italian), but at the end of the train carriage scene I was so appalled I couldn't even swear. It truly made no sense for John not to turn around and walk away from him forever.

But before passing judgment I guess I should wait for the next two episodes. Maybe they still have to really talk, maybe Sherlock was just overwhelmed by emotions and didn't know how to handle them. *crosses fingers*