Sean Dyche admitted his side came up short as Everton made it a miserable Christmas for the Clarets.
The Merseysiders charged into an unassailable three-goal lead inside the opening 22 minutes, and despite Ben Gibson reducing the arrears, sealed matters with two second half strikes.
And Dyche accepted his side need to pick themselves up for a quartet of crucial games either side of the new year.
The Clarets boss said: “We’re conceding too many loose, soft goals and not had enough details in both boxes, so there’s a number of things, but there’s no excuses.
“We are where we are and we haven’t overly deserved to be better than where we are.
“We are in a results industry and results bring belief and the extra tiny details that can matter, and importantly that free-mindedness.
“Players think less about it and the game flows, whereas when results aren’t going your way you get tight and more concerned about doing your own job.
“That mentality has to be clear now because we’ve got some absolutely massive games coming up now.
“You can play them down, but the next four are so, so important and there’s only us can work it out and sort it.”
Everton were ahead within three minutes when Yerry Mina headed home from close range.
Lucas Digne soon added a second form a free kick, before Gylfi Sigurdsson tucked away a penalty for a harsh hand-ball decision against Ben Mee.
Gibson, making his Premier League bow in a three-man defence, bundled home a potential lifeline before half time, and fellow defender James Tarkowski spurned a golden chance to further reduce the arrears just after the break.
But as Burnley’s efforts to claw themselves back into the game petered out, Digne and substitute Richarlison sealed the emphatic scoreline to keep the Clarets in the bottom three.
Dyche added: “Quite obviously Everton started the brighter of the two sides, but we shot ourselves in the foot right at the very beginning of the game.
“We changed the personnel because we’re just trying to look for that edge, but it never got a chance to work.
“You can’t judge something in the first 20 minutes when you are already three down. So much happened so early, and you can’t always decide whether that is key, individual moments.
"Strangely, they hadn’t had that many chances, but we’ve given three goals away.
“We’ve ended up conceding from effectively three set pieces and the penalty for the third one is a hard one for me because I think Ben has challenged with his arm up, for sure, but his arm comes up off their lad’s shoulder.
“But don’t get me wrong, that’s not an excuse. They were the better side and deserved to win.
“In the last 10 minutes of the first half we tried to get back in it and got more on the front foot and got the goal.
“The next goal then became even more vital and there was a massive chance for Tarky early in the second half that, if he’d scored, who knows?
“They might have got a bit nervous after what happened against Spurs the other day. Not that we deserved it, but you never know.”