You didn't solo every lane at once, you didn't gank the lanes you weren't in, and you didn't take every tower in the game. You didn't place enough wards, you didn't secure enough scuttlers, you didn't take all the neutral objectives solo, you didn't buy enough pinks. Died to a champ that did your entire health bar in ~30-40 ms? It's your fault for even being an average human with a reaction time between 70-200 ms. Don't know how every champion works down to the number? It's your fault you don't know the champion. "Good champion design" is forcing you to study exactly how the work through threat of losing against them if you don't. Didn't think about every possible scenario about champion interactions with each other, despite it being virtually impossible for the average human being? It's your fault, you're just not smart enough to play the game.
It's YOUR FAULT. Trust me Riot told me so, as well as baking it into the game as well as their corporate mantras. You thought this was a team game? Ha, good joke. If you aren't literally doing the job of everyone on your team simultaneously, you might as well not even play anymore, you're not who the game is made for.