I like Giroud and think that he is a decent to good player. When Welbeck's unfortunate injury (liked him too) became know, the club should have made signing either another quality option or a "super" quality option a priority and to get it done.
We've needed another quality option prior to Per's injury. I like the Holding singing as a long term option as did the manager--no way was he signed as a day 1 starter. Per was injured July 23rd. Once the extent of his injury was known, a CB should have been brought in immediately. Why was the only healthy senior CB on the pitch for a friendly in the 90'?
The issue is the club moves at a glacial pace for transfers. I don't care about a superstar big transfer fee signing (even though it would be nice), I do care that the club dithers about and as a result of Wenger's actions, the opening day back line is held together by a couple of kids and some prayers.
If it goes tits up for Arsenal the first two weeks of the season, the atmosphere will be bad and Wenger deserves the criticism as he waited and waited and didn't get the needed transfers done when he has had all summer as striker/CB needed players prior to injuries. No serious title challenger would willing start a season from such a weakened position.