For years, Granit Xhaka was the biggest scapegoat at Arsenal. The Swiss midfielder was seen as the root of a lot of Arsenal’s problems. He was supposedly inconsistent, ill-disciplined and rash, and many Gunners fans were fed up of him. However, last season, Xhaka seemed to turn a corner and suddenly developed into one of the Premier League’s very best players. After his best season at Arsenal, the Gunners sold Xhaka to Bayer Leverkusen in the summer for £21m, and it’s fair to say they may be regretting that decision. Kai Havertz has come in to fill that void, and he really isn’t living up to e…