Luciano Spalletti criticised Inter's passive approach as they lost 2-0 at Barcelona in Group B of the Champions League.
Inter struggled to get a foothold in Wednesday's contest at Camp Nou despite Barca captain Lionel Messi's absence due to a fractured arm.
Rafinha, who was on loan at Inter last season, gave Barca a first-half lead and Jordi Alba wrapped it up for the hosts with seven minutes remaining.
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And Spalletti was unhappy with the way his Inter team allowed Barca to set the game's tempo and rhythm, with Arthur giving a midfield masterclass.