Sorry but when the team fails this hard from what expectations were the owner deserves some blame.
Your being naive if you think owners aren't involved in signing of marquee free agents or in big trades when your trading away blue chip prospects for an ace.
Elias deserves the majority of the blame, more than Hyde and certainly more than Rubinstein, but Reubenstein is not immune from any criticism.
Now it's up to him to fire Elias after the season.
My guess is he will get 1 more chance to fix this.