Thread is going nowhere and off topic, so let me sum it up for you.
Since like cod 4, the XBOX admin team have minimal ladders for old cod games, due to the lack of effort put in by teams as they are all playing the new cod. For the first few months, you will barely see anyone playing the old cods, it is only after the first season or so that people get sick of the current cod as they are generally shit games now.
The PS3 section has completely different admins, so they will do things differently, in this case, have more ladders for old cod games. If you don't like it, make a support ticket asking for more ladders but unless majority of the community shows interest and actually play the game, rather then just showing for matches(if you're lucky), then it won't happen.
1v1 and 2v2 ladders are not even taken that seriously on the current cod games, so why would the admins invest more time in a game that is quite frankly dead.
Stop arguing with people when they give you their opinion and accept the fact that XBOX section does not have those ladders and if you want them that badly, buy a PS3 and go play their ladders.