The home side took the lead through Jon Russell before Elijah Adebayo missed a penalty and the Terriers compounded Jones’ disappointment by adding a second late in the game.
Reacting honestly to the 90 minutes, the gaffer said: “It hinged on us not defending two situations because they didn’t have to work hard.
“We were excellent I thought in terms of defensive shape, we were bold, we were brave and we moved the ball. Second half I thought we were really good, we stepped on the front foot but he’s looped the ball in the box and it’s gone in so there was an element of luck and then late on, Naby Sarr comes on who is 6”7 and no one picks him up.
“Two naive bits of defending and that has cost us and been further compounded by a penalty miss when we were really in the ascendency. It changed the direction of the game and that is what Championship football is.”
Two of the three substitutions Jones made were enforced by injury as both Pelly-Ruddock Mpanzu and Henri Lansbury were forced off, to which he added:
“We have been having to do it every game at the minute. We’re picking up injuries and having to make changes in the first half, missing midfield players and putting makeshift people in there, it’s catastrophic at the minute but we have to roll with the punches.
“We have Luke Berry coming back, Jordan Clark who has energy and quality and they are not quite ready to go yet. We’re losing people and we’ve had centre-halves who have been out but we have to contend with it.”
On a final note, Jones said: “We’ve been the victim of our own downfall tonight. One if we score the penalty, it’s a different game and two, you have to defend basic situations because they didn’t have to work for them. Then it is a different game.”