Asura is boring, Indra is written terribly, Hagoromo is an idiot, their fight is anticlimactic, Indra having Sasuke's Mangekyou is stupid, Asura using Rasengan is stupid, should I go on?
Indra was always terrible. You think anyone can handle writing a character who tries to murder his brother over not becoming the leader of "peace" properly? With Sasuke, his angst is justified, but for cases like Indra and Obito, it's not.
Hagoromo's an idiot even in the manga. Gives Naruto and Sasuke the seals without even telling them how to undo Mugen Tsukyomi, only manages to show up by chance due to Sasuke cutting Madara in two. It's also only by chance that Naruto and Sasuke seal Kaguya in another dimensions, as if they had sealed her/Madara on Earth, literally would have killed the alliance by sucking them in. Not to mention the guy doesn't even ATTEMPT to reconcile with his mother who's been agonizing, sealed away for 1000 years. Let's be real, it was a great depiction and an accurate representation of his manga counterpart.
Anti-Climactic fights should be expected at this point, what with the last three fights being just that. No need to have high expectations for SP when Kishimoto isn't doing any better. Not to mention the fight needed to end in a stalemate since we know they fought multiple times, as stated by the manga.