What answer do you expect from them? If winning on T11 was as simple as buying the most expensive/best players it would be a) boring and b) a poor simulation of the real thing

So to the first point: sometimes lower quality players will play a better rating than higher quality players. It's unlikely that they'll do this consistently or that they'll be a better option for you in the long term than higher rated players even if they do. It may also be the case that if you are playing weak opponents that your five star man doesn't have to do much to get the job done - this is roughly the point the first answer was making

I would recommend that you don't worry as much about rating as about getting a high quality in your squad. Then, if you are in a position where you have a very strong squad start to compare training speeds and ratings to decide who to move on (also consider age)

As for the games you have won/lost, remember that many factors can affect a result - if you are the better team you might expect to win, but a good counter tactic can cause you to lose, and although we can see formations of our opponent we don't know exactly how they are choosing to play

Real life example - Chelsea won the UCL last season, and had about 5 shots on target in the last three games combined. They beat much better teams to do it. In the league they struggled badly and finished 5th place

Football is a frustrating, wonderful game