I've heard a lot of people say it, and even i'll agree. The war arc wasn't THAT bad however unlike others, I feel like it REALLY falls apart when Neji dies. I say this mainly because this is when you get that last minute NaruHina shit and Kishi is pretty much like "Oh shit I forgot I need to give the main hero his love interest!" and Neji dies for nothing/NaruHina development. If anything it shits on his character as well but I don't get into it, just know there's a ton of irony about Neji's philosophy/upbringing and how he died. War got interesting when Sasuke joined, but then it fell apart again with the whole space alien Kaguya bullshit.
However the ending was beautiful and I couldn't ask for anything else. I like how they did it in ninja storm 4 more since that was my exposure.