His anger at Priya is natural tbh. Shivi is his 'baccha'. And no matter how in love he is with Priya and how abusive his family is, all he sees when he looks at Shivi is a little girl who's very special to him.
Watching her ceremony being spoiled, one she was so excited for, by his wife, no less, will definitely make him angry. Or he might feel a sense of betrayal. After all, acc to his values, Priya should always be with him and his family and never against them
Blame Meera Ma who put ideas in Priya's head😵