how do you win games

Towers.

KDA is for newbs.

Considering all skill levels are 100% equal you just need to get more experience. Any early game disadvantage you take turns into an advantage later. If you don't make use of that advantage (eg shopping early for second doran blade) then you fall even further behind. Freeze your lane in front of your turret and get your jungler to come and zone out the enemies from their experience. Get gold/exp leads and carry that into lanes that are falling behind. If you are falling behind in your lane get someone who is ahead in their lane to come help you, or go help them gank and take their lane turret to free them up to come gank bottom. Its rare that you should be pushing to second turret if there are still first turrets up in lanes. HELP EACH OTHER! If you have 1 person on your team who is capable of defending a turret and clearing waves even against 3 people then you can get the advantage in the lanes where enemies are absent. If you can't do that your team composition is probably wrong.

When me and my whole team end up feeding hard core, I like to deploy my secret strategy/weapon. I grab all of the followers I can, then (If my possy is 5 people, meaning the whole team is on board) I lead a charge to the nearest tower. I don't push minion waves. I don't attack the tower. I just show the enemies that I don't care, and then they ff. For some reason it has a surprisingly low success rate.

destroy nexus