It's what you think, yes. I, on the other hand, think it's as varied as normal for a boss theme. Look at Mokou's theme, or Utsuho's, or Miko's, or Suwako's; they all have a lot of repetition.
See, my problem is not that you think the song is not as good as others. My problem is when people just come and say "I don't understand why people say song x is so good it's so overrated". I mean for heaven's sake, what do you want? For most people to not like the music because you don't? Because that's the impression this kind of comment gives me. "I don't enjoy it, so people that do don't know as much about music/don't have a taste as refined as me". It just comes across as very pretentious, even if it wasn't your intention.