you don't understand jungling very well.
for one, dragon gets mad stacks on devourer. its hella prioritized.
for two, ganking is nice. carry your lane without it, newb.
wards: always nice. perhaps you, as a laner, fail to realize that the jungler msot often dones't have many wards, given that SINCE THE JUNGLER IS TAKING A HUGE EXP AND GOLD NERF TO ALLOW THE TOP LANER OR MID LANER TO GET AS FED AS POSSIBLE AS QUCKLY AS POSSIBLE, he can't be everywhere on the map, to ward both sides of your lane for you, while simultaneouslytaking camps, AND getting his items so that he's not irrelevant after 15 minutes into the match.
for four: by being in the jungle, he is de facto supporting lanes.
The real issue is that you don't seem to realize what the jungler does for the resources on the map, or why he would go to a jungle and the way that the jungle items (including devourers) try to offset the huge losses he takes for your team so that you don't have to learn how to lane with a partner.