I understand the desperate desire to solely blame injuries for everything that is wrong, but this is a league where if you are not prepared for injuries, both personnel wise and scheme wise, they will cause issues or "really hurt". You can take a look around the league and find numerous Terrell McClains who went down with injury. Good teams adapt and overcome, the bad ones simply don't.
Sorry if using the word massive put extra emphasis you don't think you meant. I think the "really" in front of it implies larger than normal stress.
My general point is if people are pointing to minor cogs like McClain as reasons for losing seven in a row, I don't think that is accurate. And if it is, well, we have real problems. That is what losing like this makes people do, look for phantoms.