Some of Welbeck's performances have also been criticised by the club's supporters, but the England international has said that he is "motivated" to prove himself to manager Arsene Wenger.
The 27-year-old told the club's matchday programme: "It's competition and I embrace it. Ever since I was a young kid, I've been playing for an academy with scouts all over the world that are looking for top players to come in.
"You have competition throughout your whole life and it only makes you better. That competitive edge gives you extra motivation."
In total, Welbeck has contributed five goals in 16 starts and 13 substitute outings this season.