Probably just confusion.
Seems like training under Benitez was him having a word in their ear about every mind-numbing detail imaginable, eg how many degrees their foot should be rotated when waiting for a cross. Have a look at the goals we've conceded, everyone is at 6s and 7s, no idea who is doing what and where.
Clips of BD training - 'you lose the ball, get up and work hard to get it back' etc
Footballs not that complicated. Did they know what it means to play for Everton? after a week at FF with Benny they probably didn't know what day of the week it was come kick off.