I agree 100% with Cat.
my points are
- there is no unbeaten team in t11 (maybe only if you have a full 8*-9* team )
- in your level, a 5* player (or team) doesn't have the double quality of a 3* player. One has 110Q and the other 100Q (meaning 10% more)
- sometimes a manager with a lower q team can find the right system and the players with a good form and chemistry and win the league but this is an exception. The rule is that a good q team (5* & some 6* players) with good coaching, is more rewarded during the career
- yes there are flaws, specially games with injuries and cards and yes, luck has a part on that game as in real football too.