The Gunners reached a new low on Monday night, losing 3-0 to their London rivals.
Andros Townsend put The Eagles ahead after 17 minutes, only for Yohan Cabaye to double the host's advantage on the hour mark.
Luka Milivojevic rounded off a miserable night for the Gunners by dispatching from the penalty spot five minutes later.
Perez gives Playstation's VR headset a go (Photo: 10lp/Instagram)
Fans chanted "You're not fit to wear the shirt" at Hector Bellerin and abused Arsene Wenger outside Selhurst Park after the game.
And injured striker Lucas Perez didn't help to ease Arsenal's fans' worries when he put a poorly timed post on Instagram.
Ospina looks entirely lost during his go (Photo: 10lp/Instagram)
The video shows the Spaniard using a VR headset on the Playstation. David Ospina posted a similar video five hours earlier, so the likelihood is that they were in fact watching the game.
However, the timing of Perez's post not only confused Arsenal fans but made them question his profesionalism.
Arsenal fans were not happy (Photo: Rex Features)
Here are a few of the comments...
robert_w113 said: "Not even watching Arsenal ha."
j_tarb8 said: "Yeah I know that but your injured u wouldnt watch your team at from home instead of posting stupid videos."
Bellerin was told he was "not fit to wear the shirt" (Photo: Stuart MacFarlane/Arsenal FC via Getty Images)
amirposh said: "So this is what lucas perez posts during the match..."
bidders_2017 said: "We lose 3-0 to crystal palace, we are 6th in the league, wenger out protests, players getting mugged off by us fans, none of our players can be bothered to play for the badge anymore and your there PLAYING PLAYSTATION VR!!! "We are by far the laziest team the world has ever seen". It's a joke!"
Wenger endured a tough night on the touchline (Photo: AFP)
j_tarb8 said: "Shocking. Sums this squad up."
rohan_0304 said: "Can't even watch ur team when ur injured disgrace of a team disgrace of a manager disgrace of players."
steventhebrock said: "Yeah I wouldn't watch arsenal either."