"I did more damage than anyone else on the team so I'm the best"

I wonder how your high-damage AoE moves made that possible. Unfathomable.
Good job on the one turret you took part in destroying.

I wonder how your high-damage AoE moves made that possible. Unfathomable.
Good job on the one turret you took part in destroying.
Good job on the one turret you got.
And with that, your identity as a split pusher has been revealed. Everyone else tends to group and push towers. As the game doesn't show who assisted in taking towers, they ignore the Towers Destroyed stat all together.
A lot of the time, though, people like this even look purely at damage done when the enemy happened to be a tanky champion who has a lot of health to lose.