The annoying part was that Inaho+Saazbaum kept crushing through walls whenever the Princess entered a new room.. as if they're trying to say "Hey, I'm here too"
the fight itself was okay, the fights prior to this one were hard because they had to figure out how to fight them... since the last one was a mixture of all cats so far (which was both unlikely, since all cats were so different up until that point, and boring imho), Inaho knew how to defeat him from the get-go
For me, it was a poor attempt at replicating the success and popularity of Attack on Titan and Code Geass.
*maybe* it didn't try to replicate anything at all
just like Death Note didn't want to mess around with Code Geass or the other way around for example, I don't know. ("Both have clever MCs, damn dis' copy-pasta!")
If you want to review a show you might want to view it in all objectivity and not nit-pick on stuff in one show (for example how stupid everyone is except for Inaho) and ignore the very same thing in the second show (Code Geass) just because you like that one more.