This is the problem isn't it.
Mendes just looks for potential in players because he knows that if/when they realise that potential there's a transfer that will make him money. It's a genius business model really because even the failures are paying you to represent them as an agent, thought obviously a pittance, but those big transfers on the successes make it rain. The overheads of scouting and making the sales pitch to sign these guys to the agency must be comparative chicken feed.
It's a much easier game to just find players that you think will get better opposed to players that will work together though. That's where Fosun have been duped, they look at Mendes' empire and think he's some kind of football oracle.
In the early years it was easy, pretty much any coach or player in the Gestifute stable was going to improve Wolves from the point Fosun bought them. Mendes could line his pockets facilitating deals, deals that none of the other clubs he dallies with would probably have been interested in, and Wolves were almost certainly being upgraded. He was flogging his tat but it was enough at that point, everyone was coming out of the deals better off.
It's far more difficult than that to keep everyone happy now though, the margins are too fine. Required talent greater, sums of money greater and the pool of options far smaller. Mendes hasn't any idea what it takes to build a cohesive team or squad, why would he, why would be even waste his time thinking about it. As long as he gets enough successes to keep Fosun as a customer he won't care whether the players work out at Wolves or not.
He's played a blinder really, talked them into a market they have no clue about and now he's got them wrapped up in a big investment with him as an integral, and only profitable, part of it.