More and more "big" transfers are failed ones... not just Lukaku.
Werner, Greizman, Dembele, Coutinho, Hazard, Werner, Neymar, Messi, Pepe, Sancho, Pogba etc
They cant all be frauds. Whats that about? Pressure? Money?
I think the biggest thing is the players are victims of their transfer fees, which the clubs decide. Dembele, Hazard, Grizzou, Coutinho, Lukaku were just not worth $100M+, to be honest, I don't think any player is outside of maybe Neymar, Messi, Ronaldo, and Mbappe and part of that is because of their commercial value as players.
The system also has to do with it as well.
I wouldn't say Sancho is a flop. Too soon to call.