Review of Code Geass: Lelouch of the Rebellion

The beginning of this anime is totally illogical and contradicting. The whole world just all of a sudden decided to invade Japan? I mean come on, what's so good about the country that it's worth invading like that. It's full of people, running out of land, and running out of resources. The anime didn't give any reason whatsoever as to why the Area 7 people were looked down upon so much. On top of that, the invading countries are all developed countries, I thought the world was done with annexing other countries?.. After the beginning of the anime the story line gradually grew better (thank god).Much more interesting and has a good futuristic feel to it. However, what the hell happened to the end?!? It ended so suddenly ( I didn't read the manga so I don't know if that's how it ended ) and for any anime to end like that is already a 'D' in my book. A cliff hanger ending is ridiculous.