Darren Murphy promised wholesale changes for the home tie with Portadown after his Dungannon players spurned the chance to redeem themselves after the dismal performance at Glenavon.
Swifts surrendered a lead then, just as they did in this game – and the manager has had enough.
"I don't judge performances on 45 minutes," he said.
"Our second half performance wasn't good enough last week at Glenavon and it wasn't good enough this week either.
"Maybe I have too many footballers and should replace some with players who will roll their sleeves up and put in an honest shift for 90 minutes, because too many didn't do that.
"I gave some players an opportunity to respond. We got thumped 4-1 at home, so there will be changes.
"I am not going to give them a pat on the back because they will think that this was acceptable. It most certainly isn't."
Swifts opened the scoring through Ryan Harpur but, soon after, Brian McCaul headed in and Linfield turned the screw in the second half with goals from Gary Browne, Philip Lowry and Mark McAllister, to the delight of winning boss David Jeffrey.
"We scored four and on another day could have scored more," he said. "I thought Swifts keeper Jonny Curran made two or three phenomenal saves.
"I have said it time and again, with respect to the clubs who are ahead of us in the league, the big scalp is Linfield. Everyone wants to beat Linfield. That is an age-old fact of life.
"The challenge for my players is to learn that teams want to beat Linfield more than they do Glentoran, Crusaders or Cliftonville."