IMO Madara and Kaguya's arc were the worst.
Madara getting kicked around despite getting power-up after power-up was just ridiculous.
Kaguya had potential if used properly but honestly, Kishi ruined what could've been a great villain even if introduced late into the series.
I'm going to go ahead and say it was because he was being rushed.
^^ I concure. Basically My rant about it:
- No threat feeling or overhelming force which even both Naruto and Sasuke can not handle
- Kakashi's bullshit power up, could be managed better
- Kaguya's powered up version did nothing, while when she was tired she killed Obito
- Weak showcase of Kaguya's abilities
- holding back Sasuke's Rinnegan abilities
- no bijuu dama
- lack of explosion, destruction. I expected at least moon buster
- lack of Kaguya's character
- Black zetsu talking shit and didn;t make use of his recorded battle/strategies(couldn't transfer them to her ?)
- Too short
- messed up with Ten tails story and Hagoromo's being Jinchurki
- didn't bring up any clue of other Ootsutsuki lurking in these dimenssions.
At least Naruto Ultimate Ninja storm 4 improved two things:
- BZ sounds like evil boss
- Kaguya sound like badass and really push them hard to beat her
- Kakashi's power up is not so ridiculous and he can not keep it too long.
Well the main rant is that it had great potential and it was wasted, way to go Kishi.