Benitez hasn't been given what he thinks he was promised, but, tin hat on, he is in danger of going full on Davey Moyes here if he isn't careful. Moyes had Sunderland in a relegation battle after two games after he more or less called his players shit (which they were, as proven).
The current players may be the ones that have to do the job (or not) for Benitez, so whilst I understand the idea of trying to put a bit of pressure on Ashley (I'm not sure if Ashley will give two fucks mind!), he has to be careful that he doesn't lose respect in the dressing room.