Arsenal’s summer business has come under scrutiny as the squad continues to falter midway through the season, and Mikel Arteta has been told he made a huge mistake. With Granit Xhaka departing, Kai Havertz came in as a surprise addition from Chelsea for an initial £60m, and has received heavy criticism for what has been an underwhelming start to his Arsenal career. Arsenal are struggling for goals, with Gabriel Jesus and Eddie Nketiah coming under heavy fire for failing to convert their chances, and it has been suggested by many that a new centre-forward is necessary. Havertz started upfront r…