The system wasn't being yelled at by Michael for the first time, so it didn't have any special reaction. Here, it was the one who did whatever it wanted, as long as it still did its job properly. Even a genie had no right to forbid it.
[Stop your nagging, because obviously I did the right thing. We've arrived at the point in time you wanted. For you, hasn't the time that passed been just like a blink of an eye? Even the words you wanted to yell at me, you only just now got them out of your mouth.]
The system really did speak reasonably. Every sentence, every word was the truth, but after hearing it, Michael wasn't happy.
"Damn it, that's your reason for smashing a giant hammer onto my head? Sure, I can't die here, but that doesn't mean I like getting hit by a hammer."
It was true that Michael himself wasn't harmed at all. As for 'mental damage,' that wasn't that important to him. But he was definitely annoyed and had to curse the system. Otherwise he wouldn't feel better.
