Phil Thompson believes the result was as bad as Sunday's against Manchester United.
Former Liverpool defender Phil Thompson has described Arsenal's performance against Swansea on Tuesday as 'appalling'.
The Gunners had a chance to close the gap on Premier League leaders Leicester City to three points with a win, but despite taking a one-goal lead through Joel Campbell they ended up losing 2-1 to the Welsh side.
It was the north Londoners' second straight league loss after Sunday's 3-2 defeat to a youthful Manchester United at Old Trafford, and they face a difficult trip to second-placed Tottenham Hotspur on Saturday lunchtime.
"Was it as bad as the game at Old Trafford? Absolutely," Thompson told a Sky Sports Soccer Special on Wednesday.
"They were alright in the first half - but only alright - and scored. They were dominating the game until, against the run of play, Routledge scored for Swansea.
"In the end, Swansea deserved this. Arsenal were poor."
The Swansea reverse provoked yet another strong reaction from Arsenal supporters on Twitter, with manager Arsene Wenger bearing the brunt of the criticism.
"Do people go overboard about Arsenal? No they don't. This was shocking," Thompson added.
"I can't remember Fabianski making any sort of save in the second half. This is at home. This is at the Emirates. This them trying to go for the title.
"It was an absolutely appalling second-half performance."
Arsenal were leading the standings as recently as mid-January, but a run of two wins and three draws from their last eight league outings has left their title hopes in tatters.
The Gunners are 13th in the form table throughout that time, with rivals Spurs and Leicester worryingly in first and second place respectively.
Wenger's side have gone 12 years without a league title.