Centre Adam Warren did the damage at the Parc y Scarlets with two tries after replacing Scarlets skipper Gareth Maule only ten minutes before kick-off while Aled Thomas added 13 points with the boot.
That defeat means the Gunners have now lost four of their opening six league games and are still to win away from Murrayfield and Bradley admits that with a three-week break coming up now is a good chance to reassess their start to the season.
"We got off to a poor start; we conceded 13 soft points but got it back by half-time," he said.
"The Scarlets then upped their game and really kept us under pressure. They gained the upper hand in the scrum where we did struggle a bit.
"We were very disappointed with our performance and we can't argue with the result at all.
"The boys need a break as there is stuff we need to work on before we get back into action."
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