He got 10 goals and 18 assists in the season Nasri got 11 goals and 1 assist... the latter got sold for 20+ mil and has since won the premier league, Arshavin was like Podolski, being dropped towards the end of his 10 goal 18 assist season, and barely got any starts the next year.
At NO stage was Arshavin ever crap, he was being made a scapegoat, he was EASILY our best creative player that season, but if Gibbs/Clichy/entire defence let in a goal but Arshavin conceded posession in the final third.... who got the blame, Arshavin somehow. Arshavin was by far and away our best attacking player that season(largely because Cesc was injured or carrying his hamstring injury and rarely got to his best.
At no stage since has he had either a run of games, been treated fairly, been given any confidence, he's still had some very good games since, just very few because he's played very very little.