I agree to a point but the big clubs were willing to gamble on his potential. He was great in a couple games vs Real and showed what could be there.
There is a reason he was being chased by the two biggest clubs in the world. Maybe the three biggest.
https://www.youtube.com/watch?v=ewEVCpyiQXc
That is a different player to the one at Barca and he mentally hasnt been able to cope so far but he isnt the dud he has shown or even close.
True, Valencia have always played well against RM in the last few years. They play their hearts out against them. Gomes is a passenger though and will never ever be good enough for any top team ever. His level was at his mid table La Liga team.