Okay, guys, it's PSAs With Kwaggy! time:

IF YOU'VE DESTROYED THE ENTIRE ENEMY BASE, ATTACK THE ******** NEXUS. ATTACKING THE NEXUS MEANS YOU WIN THE FRIGGIN' GAME, AND DON'T NEED TO WORRY ABOUT THE ENEMY ANYMORE EVER.

You may, however, use any CC abilities on enemies trying to defend the Nexus. Other than that, ignore them. It wins you the game.