The only player who I thought put in a complete shift, was McGuinness. Nobody else seemed the least bit interested. The OP thought Bacuna did little, but if you listened to the commentary, the only midfielder who seemed to touch the ball, was Pack. The others were hardly mentioned. Bacuna and Ralls' names just didn't come up.
The problem goes back to our five CB defence. There is no support in midfield, so they get over-run and by-passed. They can't get forward, so the lone striker is totally isolated. It's not difficult to see the issue - you can't pack your defence, and not expect to be short of players on the rest of the pitch. And you can't leave your midfield short, without putting relentless pressure on your defence.
The sooner we go back to 4-4-2, or 4-5-1, the better.