The general parts where Harold gets mad. The actual set up for those I found great. It was pretty funny to keep finding out how overloaded a hammer sign can be XD It was really just the way he reacted. I can't quite put my finger on why it didn't work for me, hence why I didn't elaborate much. It might just be a taste thing, you know? In which case you're good to go =)
The meltdown before entering Paradise is great! It really gave a nice turn to the story's usual light-hearted tone. And I personally felt that it mimicked what it feels like to apologize in real life: how awkward it can be, and how simple things can become rather tedious as a result.