Giroud failed to hit a shot on target throughout the tournament.
But he said: “All of my career I have been through certain difficulties and I have always tried to make it… so it motivates me to get better and better.
“When you go through these difficulties, it is what happens in life when you are really motivated, determined, committed. It is never easy.
“Football is very hard and people see only the nice part of the job. But we work very hard for this achievement and I am very proud to say I am a World Cup champion.
“I have been criticised a little in the Premier League but in France as well. Because for example I didn't score in the World Cup.
“But I receive a lot of messages from people who know football well, lots of French supporters. They see the work I do for the team and a lot of people wanted me to score in the final.
“I said: 'Yes I hope so but even if I don't score and we are world champions it will be the best thing that has happened in my life.'
“So I don't know if I have had a chance again tonight. I tried to work for the team and I know what I can bring to the team. It's the same for my team-mates.
“It is not one or two players or 11 players, it is 23 and that was the strength of the French team this year.
“We really wanted it because it was 20 years ago. We really wanted to do it ourselves after the amazing generation they had with Zinedine Zidane and other players.
“We are very proud to be part of it. We had a little bit of pressure but we wanted to show everybody that we ca do it even if we are young… and that's it.
“Honestly it's a dream come true, a childhood dream. I am very proud for all the people who supported us, and myself.
“It has been difficult sometimes but it is a privilege for me to be part of this team. We have been very solid, very strong all the way, until the end. And i think it's well deserved."