Not everyone. I had no idea who Diaz was, so wasn't particularly disappointed.Probably including you. Everyone was disappointed on not getting Diaz, and underwhelmed by Kulu ( based on his Juve’s performances)
I don't play FIFA either.
About the only thing I've ever advocated on here is wait and see, with every player, not just the signings. So far both Paratici and Conte have shown excellent judgement in players they've brought in.
Long may that continue