A casual mother-child outing for Jennifer Garner and her teen kid, Fin, took an unexpected turn when online critics targeted the youngster’s fashion choice. As the duo enjoyed a relaxed afternoon bonding while shopping, social media users unleashed a wave of criticism over Fin’s outfit. Jennifer Garner’s recent grocery outing with her child, Seraphina Rose, now known as Fin, has certainly caught the internet’s attention. The pair turned heads as they were spotted exiting the store with arms full of brown paper bags. The “13 Going on 30” star opted for a laid-back look, donning navy blue leggin…