Whenever you go to play online with the campaign or freeplay, set the view to everyone and make sure it is your rank or higher. More than likely it is just the simple fact that there aren't many people on, and the matchmaking is horrible. Try checking out the clan section and finding people that play the same time you do and trade gamertags. That's your best bet for finding enough people to play.
I doubt it. I think its a matter of matchmaking problems and lack of players online. You should be able to find people to play with, regardless of rank, especially since it doesn't take much time to get up to 20.
im still thinking we should can play with lower levels . low levels need a challenge right?we, High levels are a good challenge . Dont u think the same?