you don't really "get" football. It's a much older game than your american football so most people don't want loads of technology introduced like very accurate clocks, video replays, coaches with huge motorola headsets etc. The fact that decisions are made my an error-prone human makes the game on the whole more interesting as you get controversies etc. Making it all robotic would just rob the game of the 'romance'.
offside is essential, again if you understood the game you would see why it's needed.
it's not all about scoring loads, I have seen 7-0 games that are boring (its not that interesting ot see a ball go in a net) and some 0-0 amazing games. the joy of football is watching the off the ball movements, team play, last ditch defending, great saves, great shots etc. The fact goals are so hard to get makes them mean so much more when someone scores.
to simplify it all to points is pretty shallow imho, it's like you are only looking at 10% of the game?
and look at basketball? really high scores, very frequent scoring, and most of the world is bored to tears by it.