Less armies than other

During every gamesI saw theother get upto 30 armies,and I: maximum 20 (same with more than 40 territories connected).
Of course with 10 armies less every turn theendofthe game is automaticly badfor me.
Have you got an explanation?
Of course with 10 armies less every turn theendofthe game is automaticly badfor me.
Have you got an explanation?