Man I love being judged for my team's actions
Game 1: Carries lose lanes they should be winning, play timidly, may as well be AFK from then on out.
Game 2: Guys... we just saw 4 people with wards. And the rest of your team is pinging you back. Ok I guess that 0-2 was worth it. At least you almost got their... nevermind you weren't fighting over anything.
Game 3: Hey it's 4 minutes in and top is already 0-2. Whatever we can bounce back. Little did I know their mid would soon go 6-0 with no help from their top.
Game 4: Fuck it, I'll just blow off steam with an ARAM. Oh, Ziggs took Mark... and he has AD runes... and he's playing way up on one of the safest champions in game... and he can't dodge anything... aaaaand he's 0-6 and Jarvan's AFK.
Game 5: Up CS, kills, and lane pressure top. Bot lane is 0-8 by 10 minutes.
Game 7: We destroy them in a teamfight, I'm 9-3 on a carry and my team surrenders. Clearly deserved that loss.
League is a absolutely team game. Whether you win or lose depends on you and your team's actions. I get that; that's fine. If I or my teammates under-perform we deserve to lose. What I'm not OK with is having a system then judge me for someone else's performance. If my top goes 0-2 with no help from junglers then we're more likely to lose. Then if we do lose my entire team and I are judged as a worse players because of it, even if we did everything we could. How is that fair or fun?
This is a team game but you are not your team. The only time you should be judged on your team's performance is when you queue as a ranked team, and it's the team itself that has a rating. I want to be judged for my own achievements and my own failings.
Edit: To those of you referencing averages, keep in mind that averages only work for sufficient sample sizes. Then factor in that your teammates change every game and the require sample size goes way up. So no, it's neither fun nor fair.