Contrary to what you may believe about the jungler role
Junglers job isnt to come to the lane where your teammate is about to get a kill to jump in and take the players kill.
A smart and good jungler would 1) farm up in his jungle and 2) go to the lanes that need the help not the lanes that are winning and need no help at all.
Stop coming to a lane where the enemy is about to die and taking the players kill thats not ganking and thats not playing as a team. Especially if someone asks you to not come top lane and you still come just so you can leach kills off the player.
Junglers dont like when players take their buffs and jungle xp so if someone asks you to not come top lane then dont cause if they choose to not be interested in playing after you ruined their game it wont be their fault it will be yours for refusing to cooperate and play like an actual team