Four words to describe the Ninninger finale:

Rushed
Generic
Cop Out

That is all.

That's 3

1. Rushed
2. Generic
3. Cop
4. Out

;)

There's nothing wrong with you enjoying it, and it's possible that you'll continue to find other people's distaste incomprehensible. That's fine.

I enjoyed the heck out of Shinkenger, but I know there are Sentai fans who consider that series to be aggressively lazy/boring. I imagine that's due in part to it being the first Sentai I finished. Are you relatively new to Sentai? My toku-watching friend doesn't care at all for Shikenger, but after consideration, he told he thought maybe it's a good starter show.

I may've spoiled myself since then; I confess I've enjoyed most of the Sentai I've watched since then - notably Gekiranger and Kyoryuger - even more.

Ninninger is the first "modern" Sentai I've watched, so it does have a bit of a beginner's bias for me.

Well, I've been busy over the last month, so I bit the bullet and watched the last four episodes in one night. :lol And it was... meh. Just like the rest of Ninninger.
Good Points
Characters other than Takaharu getting to do things
Tsumuji and his awesomeness
Kyuuemon kill stealing out of nowhere :lol

Bad Points
The complete mishandling of Kyuemon's character in the last episode
Main Boss Dude doing nothing whatsoever
All of the generals going down like punks, come to think of it (except Gabi Raizou-I expected him to die like that)
Triple AkaNinja- sure, it was pretty cool, but other colours? Especially since you made a green one just for the Returns Special...

So, will I miss this show. Not really. It was alright, but it's nowhere near my favourite. It just wasted too many ideas, and was far too underwhelming. But it

I thought Dokoku was the worst Sentai boss villain ever, but now that crown goes to Gangetsu.

Finally watched the finale last night. Wow, that was underwhelming. So the ninningers basically can just say "Hey, I need to be stronger" and get stronger? Kyuuemon had The End Shuriken AND the Last Ninja powers and basically got beaten by everybody because they wanted to be able to beat him? Then the battle against Gengetsu comes and they completely rush through it. At least it further confirmed my theory that Kyuuemon was the actual main villain, while Gengetsu was just a catalyst for the action. Also, if The End Shuriken is so easy to get rid of, why didn't they do it a while ago? Why spend so much time trying to guard the thing from being used by bad guys to destroy the world when you can easily just destroy it?

That episode annoyed me. Bring on Zyuohger.

Loved the ending that was fantastic. I am seriously going to miss this show a lot. Definitely one of my top favorite Sentai.