Don't get to late game or babysit for 3/4ths of the game.
It's really stupid. I think he needs a rework because he's so easy to deal with, yet it's so boring and requires a lot of your time. This causes a lot of people to play him in Gold and below.
When you are around level 6 it's time to make a choice how you're going to deal with him. Are you going to babysit him in lane and deny him farm, or are you going to travel to other lanes and get your teammates fed and steal objectives?
You either need to pressure other lanes as hard as you can that you cause a surrender, or you need to keep acting like it's the dreaded laning phase for like 25 minutes until your team bests his teammates.
What you choose may also depend on your power spike. Irelia for example has a crazy spike mid game. She's absolutely going to roam and try to end the game before 25 minutes hits.
If you picked Quinn for example, you're going to want to stay in lane, keeping up the harass on him, and freezing the wave. She's actually perfect for dealing with him, and you can maybe get in a few ganks here and there with TP and ult.
Teemo is like a less effective Quinn against him, but you can absolutely make it work with the blind.