So this is my take on why each year more and more players of FM say the game is broken, and never want to play it again.
SI are simulating the world of football. The most frustrating game in the world. Anyone who watches football, knows that many games are stupidly one sided.
With one team dominating possession and shots, and yet still loosing the game by 2 or 3 goals. Nothing in football is guaranteed, you can have the best team in the world beaten by a rubbish team. From a lucky goal, or just a greater will to win.
This is what also makes it the greatest game, no one ever knows what will happen.
If you play the same game again again in FM and note down the result, you will see that the outcome can differ massively. That's the randomness of football. With tactics and better players you can try and give your team greater advantage, but its still not a guaranteed win.
And that's the problem SI have, as they simulate the game more accurately every year. It becomes less and less fun to play for a lot of people. You can be the best FM player in the world, but you can still be beaten by the random element of the game.
That's my opinion anyway, bit of a ramble.