The moment when you play amazing but a dc ruins it

https://gyazo.com/b6df4d62955d345d8157f30ba80e1814

I was 17/1 around 20 minutes and we ended up taking mid inhib turret down and then our top laner, irelia, disconnects ruining what could've been one of the best lee games I've ever played. You can say that I'm salty, but riot please do something about people who leave the game or disconnect and don't come back to the game. Disconnecting for like 3 minutes is something that I can brush off, it happens you know, but when someone "disconnects" and doesn't come back to the game that lasts another 15-20 minutes pisses me and I would assume everyone else off..