Why are people so bad at this game?

I do not understand why people are so bad at this game. Especially these pre-made teams. Honestly, if you play ranked games, don't play if you do not understand the basics of this game! If the other laner is ahead of you, don't try to 1v1 them! Don't push them! Why do people constantly push so far and bitch like a baby when they get ganked?? Why do people have no map awareness?? Even worse when you warn them, ping them, call mias, and they bitch that you're laner ganked them. Well no shit! You're pushing the tower, under leveled and expect them not to take advantage of your garbage plays?