Don't say 'X person doesn't do anything in fights' when...
- ##Their role isn't to teamfight in the first place.
- ##You're directly impeding their ability to teamfight. If your role is to peel, peel. If your role is to engage, engage. If your role is to zone a carry out of the fight, zone them. Don't blame your AD Carry for getting zoned out of a fight because you burned your Braum ult offensively, or because you were sitting in the backline instead of sitting on their immobile Jhin's face.
- ##You're forcing fights that shouldn't happen. It's not even just fight when you're behind or fucking with a numbers disadvantage. Don't fight if the scenario doesn't meet favourable conditions. A really simple example of this is when you have a Teemo on your team. So often, there's a plethora of Noxious traps in a section of the map. Draw the enemy into these. Use neutral objectives to force them into the area or use them to kite. Don't force your Teemo to teamfight in the middle of a lane - you're denying him meaningful access to 50% of his potential damage.