Originally Posted by
xxDoLLarBiLLxx
it wasn't always like this. Which is why the universal thought is that Bleach Soul Society ARC was its peak(probably one of the best arcs in shounen manga history). It had everything in it: Deaths, great fights, surprises(nothing cooler than when Zangetsu first made his appearance), the aura of the captains....and so on..It was just a great arc. When you hit your peeak like that, there's no way to go but down. Thats why you see the writing become worse and worse as the series progress.
Kubo tried to recreate the magic with the Hueco Mundo arc but it only made it worse, for 1 Inoue is not Rukia. She was always a pitiable character so to make the audience(reader) have pity for her was unrealistic. Rukia on the other hand was always an arrogant character who never showed weaknesses, for her to look so weak during that SS arc was great theater. Not only that, you also had the older brother who was willing to sacrifice his own sister. You had the best friend(who likes her) who was jealous of Ichigo's straightforwardness in saving Rukia. Everything about that arc was gr8.
I think Filler also swayed people mind off bleach too because coming from the gr8 high of that SS arc in the anime. the older fans were faced with Fillers which kinda turned them off bleach. So they went back to the manga only to try to stay interested in the series. But that didn't turned too well since the series'writing went to sht after also.
My guess is Kubo waited too long to add some meaningful stories in the manga. And that Hueco Mundo arc....and the whole kidnapping Inoue smelled Rukia part 2 in diff world. Not only that, it doesnt seem the kidnapping amounted to anything. I think this whole arc is what really killed the manga in a lot of people's mind.