Listen to the recording again.
The previous aircraft, a Delta, requested a further left turn due to the weather of 070˚. The Shamrock was next and was given a heading of 100˚ (presumably the Delta was given something similar) but refused the turn due to the weather. The weather may have been moving north or north east as would be common, especially if the wind was down the runway 22. Looking at the screen this appears to be the same weather as the Delta had requested avoidance for, granted the Delta opted to pass the weather to the north while the Shamrock chose to pass it to the south. Also according to the screen color coding, there were different levels of intensity in the weather, not simply the 'lightest' one.
It is certainly not correct to suggest that the 330 crew were alone in their concerns regarding the weather, as the controller seems to suggest. I'd like to hear the recording for the previous few departures.