[Suzu]

I think the problem many people have with Ninninger is caused by what they expected the show to be. The last three shows (starting with Kyoryuger) were very similar in tone and comedy- basically because it worked in Kyoryu and Toei still wants to play it safe after the whole Go-Busters story.
Many people hoped that Ninninger, due to the very asian designs, would be more like Shinkenger, which many people still consider one of the best Sentai evuurrrrr, because it's dark and... dark!!111!

Ehhhh anyway. Lately people have been crying for a different type of Red because many people like stoic characters like ShinkenRed. They consider Daigo, Right and Takaharu the same character type (which isn't true, despite some similarities). Also, many reactions to Toqger have been REALLY bad and people who disliked Toq also often don't like Ninnin.

But let's face the facts, guys... this is what Sentai is like these days, at least for now. Either try and give it a chance or stop watching for a while if you can't bear it.