No I don't see anything wrong. He invested a sizeable amount of money to gain an advantage, what do you expect Nordeus to do? Maybe put him in +4 level competitions where his advantage will be wiped off and he will just be another 6 star team? How will that be fair to him?
As a manager who constantly compete in +1 level tournaments where some super teams manipulate the draw so bad that they end up in -1 level tournaments instead of being in +1 level tournaments themselves, I find complaining about a -1 level team ridiculous given that Nordeus already gave you a clear 20% quality advantage.
Here is one of such +1 level teams I've had to face this season
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