Del Bosque's final disgrace

I am of the firm opinion that the only one to blame for Spain's disgraceful exit is Vicente del Bosque. In yesterday's match against Australia he showed himself as inept again. David Villa finally started instead of the hapless Diego Costa, and left the impression that he could have helped Spain in the previous matches, fighting hard and scoring a nice heel goal for Spain. This was to be the last match for David Villa on the Spanish national team, and del Bosque took him out amid Villa's tears. And what was Mr. del Bosque's comment? 

"I did not know it was his last match for the national team".

Does this coach even talk to his players? 

Del Bosque has proven incompetent in tactics in this tournament, and apparently also in player management.