If you want to win games, don't play top
Top is hands down the hardest role in the game to carry from. It used to be support, but support player whined and complained enough to break the role. Sure, I've had some games where I've hard carried as top, but the effort required to do so is massive.
Right now, LoL is won from the jungle and bot lane. Mid can have some influence, but usually you have to be pretty fed to hard carry.
Instead, the easiest way to win games is to just pick jungle or bot lane. All three of those roles have direct influence on how the game will play out. I really hope Riot does something to fix this.