Wii Would Like To Play...Better Games.

So, I bought my Wii (since dubbed Wiiner...I know, really mature) a while ago, and I was impressed with its abilities. I have only owned Nintendo consoles since the N64 (yes, I was a latecomer to the video game scene), and the latest generation was no exception. It was cute and Apple-esque with it's sleek, white design, and it's compact frame fit neatly next to the TV in my teeny dorm room. And for a time, we were in love.
While I still have fond feelings for my Wii, I have lately become a bit disillusioned. The Wii has so much potential to be insanely fun, and it's falling short. While there are some pretty awesome games for the Wii (Super Smash Bros. Brawl, Super Mario Galaxy, Legend of Zelda: The Twilight Princess), I feel as though they are few and far between, and not exactly being the most patient person, I am getting frustrated with the lack of selection. It seems as though most of the Wii games cater to the kiddie crowd, and the older "gamers" are getting left in the dust. I understand that a lot of the Wii's success comes from its appeal to everyone rather than the stereotypical gamer, but I want to see some more hardcore games. Or at least a decent RPG.
What really did it in for me, though, was seeing Assassin's Creed for Nintendo DS. Seriously, WTF. You put a game like that on the DS and not the Wii? What on earth is wrong with these people?