But he fully expects his team to bounce back when they entertain the Exiles and hit form before the Guinness Premiership explodes back into life in the coming weeks.
"It was a poor display by us and I take full responsibility for that. I fully expect a reaction from my team this week," said Ruddock.
"We didn't play to the levels we know we can. We weren't good and I accept that. Now we have to bounce back and show the fans we are capable of going into the next round of league games in much better shape.
"We rested players before Gloucester and it's a difficult balance getting those rest periods right," he added.
"Some squads have got a bit more depth than we have got. We have a lot of young players coming through and, in fairness, over the last couple of years a number of them have stepped up. But that is no excuse and I am not trying to make any, we were not good enough.
"We have got a huge Guinness Premiership focus at the moment and, as much as we wanted to win that LV= Cup game last week, our major focus is the league and I've had to make calls on the back of that.
"Do we really want people getting busted up in Montpellier when we are out of the competition? We have given the players quite a lot of fitness work over the last couple of weeks and we want to see that balance of rest and recovery will be exactly what we need in the second half of the season.
"We are not where we want be in the league, that is clear. We have to get up that table and we have made some calls to try and get the best out of ourselves. We have to finish strongly in the second half.
"The plan has always been to pick strong teams against Gloucester and London Irish and we will stick to that."
Watch Warriors in action in the LV= Cup this Saturday! Call the Warriors Box Office on 01905 454183 or visit the online Tickets section at www.warriors.co.uk