Iñigo getting blocked by Nteka, yet some rival clubs do not understand how this works

As you can clearly see, Nteka is blocking Iñigo from running, hence the referee decision to disallow Rayo Vallecano's goal firmly stands. The decision is legitimate and there's a reason why the Rayo Vallecano's head coach and the players were not complaining. I do not understand how other rival clubs consider this as a robbery when they do not understand how football works.