Try not to post any complaints about your “Lagging” “Not being able to connect” or your correct rank not showing.
It happens to EVERY game.
I remember MW2, BO, even BF3 had HORRIBLE connection problems during launch day.
There are A LOT of people playing, sometimes the servers can’t handle it. Just give 343i some time to sort everything out.
NOTHING IN THIS WORLD IS PERFECT.