"It was terrible. I can imagine how bad it was to watch. It wasn't great to play in," said Boss.
"The win was the important part of that and we'll take those any time of the day if we come away with the four points," he said, in truly professional style.
"It is important for a team to be able to grind those out, you know what I mean. There is one or two we have let slip in situations like that this year, notably not long ago against the Ospreys.
"So, racking up those four points was really crucial and they were ahead of us in the table so it turns it into a seven or eight-pointer."
The return of a cavalry of Ireland internationals, suitably on-song from their demolition of Argentina, and Springbok Heinke van der Merwe brings an immediate injection of confidence.
Apparently, the video review of Italian club Zebre showed enough information to make the Leinster brigade sit up and take notice of the winless bottom club.
"Zebre will be tough, no matter what people think. They have scored a lot of tries of late and there is plenty of footage for us to worry about," said Boss.
Certainly, the Italians have reeled off six tries in three defeats to The Scarlets (1), Ulster (4) and Cardiff (1) for the gain of three bonus points from the last two matches.
This all happened during the November international window. Leinster mean to get back into the swing of things before the back-to-back combat against Clermont Auvergne.
Ireland's reserve scrum-half Eoin Reddan needs game time at the RDS on Saturday.
Boss will be keen to see he doesn't get too much of it.