He went to sleep because he thought he was alone in nature surrounded by friendly animals like he was a Disney Princess and could rest for being tired. The minute he felt that was all bullcrap he immediately opened his eyes and started smashing through the mansion again, as though that was not actually an issue. That doesn't speak to really being all that tired.Why would it be way too broad? He has problems in this issue, he got tired fighting the X men /danger room in the next and Apocalypse restrained him after that in the next issue.
At the same time he's also supposed to be all jacked up for all the energy coming into him. The narrative had different directions it wanted to go in.The Hulk is literally supposed to be dying. That is the narrative, that sometimes he ignores the pain doesn't make the times he didn't irrelevant.
Or the writer's intent was that sometimes the Hulk had problems, and sometimes not.If anything the times he wasn't weak are the outliers, the times the writer forgot or had Hulk "struggle through the pain" considering the main thrust of the story is that the Hulk's indeed having issued enough to take help from Apocalypse and the ilk
At that, the Hulk accepted help from Apocalypse to shut up the voice of his father he was hallucinating due to the shrapnel in his head/the Hulk being basically insane (or possibly it was actually his father's ghost and all of those other things were rationalizations) considering that even after Apocalypse supposedly removed it, he was still seeing his father right until the helmet went on.