It's on Benitez to a degree, but people have forgotten in a hurry just how abysmal we were under Ancelotti at home.
Remember Fulham? Josh Maja helping himself to two goals, completely abject 2-0 loss? Same sort of performance.
The consistent feature in this is the players. They are terrible. Actual professional cowards who put in these performances over and over again.
You can criticise Benitez for facets of the performance - set pieces and substitutions, totally on him. But it's so, so much deeper than that.