People not joining games??

So every time I see an available lobby and I try to join it fills up almost instantly. Most of the time I get the 'error no slot available' message. I never see more than 10 lobbies and they all fill up within seconds of me seeing them. There is clearly a lot of demand. So I try to make my own lobby, and a solid 90% of the time I sit there alone indefinitely. Are people not able to see my lobby? And am I unable to see other's lobbies? Anyone have a similar issue?