Your mentality is the cause of your massive failure in ranked. If you gank and fail, leave and farm your jungle. Don't take the laners cs, you already sapped off some of the xp while you were there when minions died therefore giving the other laner the level advantage in lane. If you gank and succeed, awesome, either push down the turret or leave and go back to doing your job as the jungler.
Here is a math/LoL lesson I gave to someone else:
Math:
Minion waves spawn once every 30 seconds
Jungle camps, with the exception of red and blue, spawn every 100 seconds.
Each jungle camp gives a tiny bit more experience than a minion wave.
At 300 seconds (or 6:55 in game since minions get to lane at 1:55 and jungle camps spawn at 1:55) there will have been 10 minion waves and 12 jungle camps, not including red and blue. However, the number of jungle camps cleared and how quickly they were cleared determine how many camps will have spawned. More than likely, you will see around 8 camps, not including red and blue, by that mark.
If you are on top of your shit in the jungle and clear the camps as they spawn once every 1:40, you will outlevel your bot-laners and be close to your mid and top in levels, possibly higher if you have been farming the jungle (because there are more camps spawned every 100 seconds than minion waves)
You cannot dispute the facts that I just posted. Lane tax is something Bronze-Platinum scrubs do. In a game with skilled players you will not see a jungler take someone's farm because "they failed a gank." However, you may see them push the lane with the laner in order to get objectives, such as turrets/dragon