Why does Owen storm off in the middle of scene 3 act 1 in the Melville boys?

In Act 1, Scene 3 of "The Melville Boys" by Norm Foster, Owen storms off due to escalating tensions and unresolved emotional conflicts among the characters. His frustration stems from feeling misunderstood and overwhelmed by the dynamics at play, particularly in relation to his brother and the romantic entanglements that complicate their interactions. This moment underscores the themes of familial strain and the struggle for personal connection within the play.