I agree that sometimes people complain to mutch, but we all have to agree that we see to many stupid results.
It is natural to lose games, but a lot of time you look to the game stats to try understand what happened and they dont make any sense.

How many times you see teams loosing a player by red card, and sudently there possession rises and score 2 goals, i sem not saying that a team cant won with 10 players, but it is impossible to end the game with more shots and almost same possession.
The GK got injured and is replaced for a field player, that starts you play as GK end His on position at the same time, or he is replaced for more that one player.

I think the big problem is the stats and ratings being to random, that make impossible to understand Why a team lose or win.