A player Arsenal sold has now received some serious criticism from former Belgium midfielder Radja Nainggolan. The Gunners have had a number of top-quality players over the years. Some of them became stars at the Emirates, while others either chose to leave or were pushed out of the club for one reason or another. One of those ex-Arsenal players has really angered Nainggolan recently, and the former Roma and Inter Milan midfielder has had a real go at him. Radja Nainggolan tears into former Arsenal star Matteo GuendouziMatteo Guendouzi‘s time at Arsenal was really interesting, wasn’t it? The G…