But it IS good for him. I mean, he worned out himself soo fast and he was insisting that he is ok even if that was obvious lie. Emm, I don't know how much time passed but I guess it wasn't more than three weeks, if I'm right then in such short amount of time he changed from rather reasonable hero into soo self-destructive person that continuation of his work while he is in such bad condition would be almost the same as suicide. He can continue his searching but he need to do that in more reasonable way.
Soo they called it "Dark Deku", that sound like villain name for his evil twin brother. Well, good thing that seemingly it's the end of "Dekus solo adventure". That was really sad to see him alone all the time.