yeah i feel what do you feel bro. I don't know exactly why it's happening, even i ever faced a very weak team, only 3 quality stars (about 30-40%), and i lose with score 2-0. 2 bro?!! 2 when his defense player's quality only at average 3-4 stars can hold my strikers that have quality 5-6 stars. even his formation have 4 defender but with strange position, there is an empty place at left wing.
but my bro, i also have ever faced a very strong team when i still at 4-5 stars, he is at 6 stars, just like there is no chance for winning that game, but my team beat him at score 3-2
so what i mean is, maybe the gameplay's programming really at random mode. Mixing from quality, moral, and maybe with your phone's type XD