He was rubbish is a mantra that you made up yourself just now. His problem is he never could score enough goals to carry a team. Thats what most people were saying. We said similar things about every striker since RVP and later Sanchez. Those 2 carried the club on their backs until they left. Giroud has the unenviable record of going to a WC, playing literally every game and not scoring a single goal.

This from a search just now:
Olivier Giroud set a remarkable record after playing 90 minutes without touching the ball. His other unbelievable record was set in the 2018 World Cup as he played 546 minutes in the tournament without having a single shot on target.

I can imagine him and his kid having this discussion

-Papa what is this?
-Its my World cup winners medal
-Whoo! What position did you play?
-I was a striker
-How many goals did you score
-Isnt it time for you to do your homework