The former manager says it has been the same old problems for them this season.
The Gunners ended 2015 at the top of the table and looking like they were genuine title contenders this season.
Instead, a disastrous 2016 so far has seen them slip to third in the table and 10 points behind league leaders, and likely winners Leicester City.
That has led to some serious soul searching at the club, as people try to discover where and why things went wrong.
And when discussing the issue, Souness says the loss to Manchester United showed his there is a weakness in this Arsenal side.
“I go back to that game at Old Trafford, when I was particularly critical,” he told Sky Sports.
“They could have put a marker down that day and instead they got rolled over by a very ordinary Manchester United team. That showed a weakness and a vulnerability.”
“Arsenal are the same old Arsenal. When they’re at they’re best they’re great to watch, when they’re at their worst they can be rolled over by anyone.”
Serious questions are now being asked at Arsenal as a result of this season, with many believing it was the ideal time for them to end their title drought.
Arsene Wenger is the centre of those questions, with many now questioning whether it is time for him to end his long reign at the club.
And exit seems unlikely though, and instead the Frenchman must look to seriously improve his squad this summer to try and turn them into genuine contenders once again.