Watch a few games. And, you know, figure it out.
"Why do the players dive like 90% of the time?"
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"Why are there so many leagues? It's easier to follow one, like other sports."
Oh, maybe because it's THE MOST POPULAR SPORT IN THE WORLD.
"Why don't they score more goals? I would watch if they scored more often."
Why are touchdowns worth six points? Why do baseball players fail 70% of the time when batting?
"It's the 90th minute. Why don’t they end the game when time runs out?"
That's because time runs out when the referee decides it has run out.