I agree, but still he could show respect towards the club and his teammates. 3 years ago he was pretty much released from Barcelona. They had Neymar and Messi and purchased Suárez, so Sánchez became unneeded. Back then, Arsenal trusted in his quality and payed good money for him. Top European clubs like Bayern, City, or Juventus were not really interested in him, Arsenal was the club who wanted him very much. Arsenal don't pay 42 million euros for players all the time like City, it was a big step for them. Alexis must be thankful for Wenger for trusting him, he handed him the chance to show his quality after the Barcelona spell.