So I've noticed that heavy passing offense isn't very successful for me. Is run game more dominant than the pass game?

in roster only 100%.........top WRs are lucky to get 700 yards

No passing is a must in regular leagues. I know nothing about roster only. You may not be looking for the right players or calling the best pass plays. There are player weight threads to look at and take a look at what the best teams are call for pass plays.

Don't use any long passes at all, those usually end up incomplete or with a sack.