It is annoying to lose against a weaker opponent, but imo it is also a good thing that a random factor can make the difference, at least as long as the difference between the teams is between 0 and 20%, because losing against a team +20% below your rating with no manager watching the game shouldn't even exist. However it would be boring as **** if the better team always win.

To be honest, although I understand how you feel, because I felt that way before, I don't think this particular case is a good case to point at the engine. A draw between 13% difference teams that had no manager watching the game seems normal to me. Not saying that it is 50-50, but probably 80-20 and **** happens.

Good luck in the next round!