Gloucester boss Nigel Davies was left frustrated by his team's performance as they went down 39-13 to Northampton Saints.
Davies' side conceded 29 unanswered points in the final 25 minutes of the match at Franklin's Gardens on Saturday, a capitulation that left the Welshman unhappy.
"Their bench did impact the game, but I just felt we didn't impose ourselves on any aspect of the game today, I'm really disappointed," Davies told the Northampton Chronicle and Echo.
"We were inaccurate, we gave away sloppy penalties, and you can't afford to do that against a team of this quality.
"They really hurt us in the set-piece.
"We were in the fight in the first-half but I was still disappointed with us, I think both sides made a lot of mistakes and it was a poor-quality half.
"We were dropping off too many tackles, but unfortunately we were even worse in the second half.
"Do that against a side of Northampton's quality, and you'll get hurt."