There are some games where you just can't win.
But if you're playing an auto attack jungler, invest heavily into vision and keep a sharp eye out for everyone on the enemy team who is still in lane and who left. The moment one of their lanes is empty and no one is there to defend it, run to there, set up some vision, and tear down the tower as fast as you can. Done correctly, you can reclaim a lot of map presence with little resistance, at least until the later stages of mid game.
Also, if you're a jungle main, you should test what junglers can solo the dragon at what stages of the game. Many Devourer Junglers are still capable of soloing the dragon at level 6-7, for example. Any champion with an auto attack blocking mechanic like Fiora, Jax, Pantheon, Wukong (if you're very careful), and others can pull off dragons as early as level 3. Dragon buffs are powerful this season, and if you can't depend on your team, you should figure out which junglers in your arsenal can take on the dragon with little to no help.