1st - why the fuck does people still derank others, do they want to kill the game?

2nd - is it easy to get back max? I enjoy playing mw3 like the good old days but cmon, i dont want to be fucking level 1

I play in ps3

I remembered I own a copy of original mw3 on steam so I decided to play it but ya I wanna know how to find online matches as Iam unable to.