you might be doing something wrong then, supports win games. you have to help winning mid (smoke gank if needed) also make sure carry is safe in the lane (wards are good for this) and its ez game, keep ganking after that dont ever stay in lane doing nothing. if u did ur job correcly ur carry would be lvls ahead of the offlane and he can farm safely alone, keep ganking with smokes. starting with boots is really good for ganks