Hi Imari, glad to see you around! Well, those are the kind of emotions that we wanted to achieve in the actual ending of the game. Robin might be evil or scary, but you can't help but feel sorry at his situation. As for Michael, you can't blame him... he wasn't expecting to find an actual "creature", so it's understandable that he ran away. He was still convinced it was old man Blackwood hiding in the basement. Just think about what you would have done in his place
Many wonder why Michael never told the authorities or did anything else after leaving the house. But remember his last words: he was in shock and couldn't understand what he had just seen. He feared that everyone would disregard his story and take him for a madman. In any case, he probably wanted to keep the secret for himself ;D