Ok so he did go past players with skill but you won't give him any credit for that despite thinking he couldn't do it - because you've decided the defenders where tired. Fair enough if you think that is an aspect of his game that could be better but in that game he was skillfull and did go past players and so credit where credit is due. I actually think he is pretty skillfull and can go past his man, he just sometimes needs a little bit of room - which can be the case with big players.
What I like about Giroud is the effort and commitment he puts into every performance. Even when things aren't going right he puts in 100% and never stops trying to make things happen. We know he has the quality, so its only a matter of time before his effort is rewarded.