[Matrixbeast]

Decade.
Decade
Decade!

A series about a dimension crossing Kamen Rider who has the power to transform into the previous Riders and use their powers. That alone sounds like a lame fanfic.

It fails character wise because it tries too hard to make Tsukasa the ultimate Gary Stu. He's perfect at everything (With a token weakness of "Can't take pictures"), even gaining abilities as he crosses worlds. He can apparently outfight everyone. He has a dotting girlfriend who would go to the ends of the earth for him and his only reactions is to just blow her off. He has a best friend who would go to the ends of the earth for him and his only reaction is to just treat him like he's dirt. He's an amnesiac with a "Mysterious" past, and he's also the leader of Shocker.
And that's just Tsukasa. Natsumi is only there to play up Tsukasa. She experiences no growth or change. She exists solely to occasionally act as Tsukasa's morality bug. Yusuke was only important on 3 occasions. Kuuga world, Agito world, and Den-O world. Kaito is pretty much the closest thing this show has to an actual character, and even then, his storyline with his brother and the Dark Rider world was never resolved.

Story wise, it's just a giant whirlwind of failure. It features a plot that's semi interesting (Decade going around befriending the riders, only to find out that the AU worlds were supposed to be destroyed to allow the original worlds to survive), only for it to go nowhere and, literally, unresolved. Writing changes to the finale and the movie making it feel extremely incomplete. Characters never really grow or change, just kind of stagnate there as the series goes on. Tsukasa as a character never becoming endearing.

Action wise, it was awesome. But it's Kamen Rider. All the series have awesome action.

It's an anniversary series that only exists to show the old costumes again. That's no excuse for being such a horrible series.

That said, Decade is a great series and I will happily rewatch it.