Glasgow coach Sean Lineen accused his players of being amateurish in their five try 41-31 victory over Viadana, letting the Italian club collect a bonus point of their own.
It was a view backed up by Scotland outside half Dan Parks that Glasgow had underperformed, but the he felt they had achieved their main objective in coming away with a bonus point win.
Listen to Sean Lineen
Listen to full interview with Dan Parks here
"I have nothing good to say about the game other than the five points," commented an infuriated Lineen afterwards.
"Three of their tries came from our mistakes in attack, I do not want to blame anyhone but it was a bad day at the office.
"Viadana showed guts and took their opportunities but that was as poor a performance from Glasgow, as underwhelming, as there has been in my time in charge.
"It is just very frustrating, in a game like that you need structure early on, a set of basics you do for 20-25 minutes, we spectacularly failed to do that and did not play to the game plan.
"We will have a chat on Monday and it was one of those games when we could nto have done anything worse in attack than we did. It was so amateurish, so although we got the five points from a coaching point of view it was really depressing.
"When the boys look at it on Monday they will realise the way we played was unacceptable, it was not up to scratch."
Outside half Dan Parks agreed the game had not gone as planned. "We would have liked to have been more clinical, we were still making a lot of errors which is very frustrating.
"But at the end of the day we got five points as we should be reasonably happy about that though we probably are not.
"We want to keep our form going, we scored more than four tries on this pitch which is not so easy as it is not wide. We are not entirely happy, but we are happy with five points."