1. Arriving 45 minutes before kick off
Arsenal's coach arrived at Selhurst Park at 7:13pm on Monday night, just over 45 minutes before kick off.
As difficult as it may be to make your way from north to south London, the failure to properly prepare for the match was inexcusable.
2. Theo Walcott's post-match interview
Sky Sports pundit Jamie Carragher had to bite his tongue to prevent himself from swearing after watching Theo Walcott's peevish post-match television interview.
"I think they just wanted it more. You could tell they wanted it more. You could sense that from the kickoff.”
Walcott's feeble comments demonstrate Arsene Wenger has not just lost the dressing room - he's lost the ability to motivate his players.
3. Granit Xhaka's performance
It's difficult to remember the last time Arsene Wenger picked up a real gem in the transfer market - but last summer's £30m plus deal for Granit Xhaka can only be described as a failure.
The former Borussia Monchengladbach star has picked up two red cards in the Premier League this season and has proved to be more of a liability than an asset.
One moment in particular summed up the Swiss' ineptitude on Monday evening. Picking up the ball near ten yards inside Crystal Palace's half, the 24-year-old dawdled under zero pressure before scuffing the ball ten yards straight at Jason Puncheon.
4. Hector Bellerin arriving with two washbags
Hector 'Two Purses' Bellerin. Man dear. pic.twitter.com/b9ftXFCEFa
— Alan Tyers (@alantyers) 10 April 2017
May not be included in any end of season post-mortem, but it's just unnecessary, isn't it?
5. Arsenal fans lay siege to the bus.
Warning: video contains strong language.
— SPORF (@Sporf) 10 April 2017
In a clear indication that Arsenal fans have reached breaking point with their under-fire manager, away supporters surrounded their team's bus as it tried to leave Selhurst Park on Monday evening.
READ MORE: How Crystal Palace v Arsenal unfolded
6. Ian Wright's assessment
Wow some of the comments I get from Arsenal fans on here��.At least I f*****g tried ��.That dressing room is lost. ��. Brilliant stuff palace ��
— Ian Wright (@IanWright0) April 10, 2017
One by one former disciples of Arsene Wenger are turning against their former manager.
For years Ian Wright has been a vocal supporter of the manager and his philosophy, but Monday night's dismal showing seemed to mark a turning point.
"That dressing room is lost," the former Gunner tweeted, before sarcastically saying he was "looking forward" to Wenger's post-match interview.
7. Arsenal's form since February
— Telegraph Football (@TeleFootball) April 10, 2017
Since February 15, Arsenal have only managed to beat one professional team in all competitions - with that victory coming against West Ham earlier this month.
The Gunners have also now conceded three or more goals in four consecutive away games for the first time since 1929.
8. Banner bonanza
Protest banners calling for Arsene Wenger to leave the club are increasing in number with every passing game - although they do seem to be shrinking in size, which might be some consolation for the Frenchman.
9. Arsenal chants
Disillusioned Arsenal supporters bombarded their players with cries of 'you're not fit to wear the shirt,' as the divide between the team and its supporters became even more stark.
At one point fans refused to give the ball back to Hector Bellerin as the Spaniard tried to take a throw-in in front of the away support.
10. Crystal Palace chants
Crystal Palace fans taunted a despondent Arsene Wenger with cries of "Arsene Wenger, we want you to stay."
The 3-0 win was the first time Palace had beaten Arsenal at Selhurst Park since 1979.
11. Wenger's blind defence of his players
One of the criticisms consistently levelled against Wenger is that he has paid for protecting his players too much.
His refusal to criticise the team after such an abject performance illustrated why the Frenchman has become a maddening figure for Arsenal fans.
12. Mesut Ozil passing to a substitute
On an evening in which Ozil was once again accused of going missing, the German's anonymous performance was summed up when he mistook Alex Oxlade-Chamerberlain's yellow bib for an Arsenal away shirt - picking out the substitute with a pin-point pass that drifted out of play.
13. Refusing to address his future
"I think it would be inconvenient to speak about me tonight, it's more painful to lose the game like the way we lost this one," said Wenger after the game, but his refusal to confirm or deny suggestions that he is ready to sign a new two-year-deal is only compounding fan frustration.
14. Alexis Sanchez
Speculation around the Chilean's future at Arsenal continues to go unaddressed and his body language in recent months suggest he has detached himself from the team and its manager.
On more than one occasion the forward flung his arms up in frustration as he struggled to accept the meek efforts from his fellow teammates.
At one point the 28-year-old turned to the travelling Arsenal fans and held out his arms as if to say "what more can I do."