My heart truly aches at the plight of this young girl. As a woman and as a mother of a daughter I can't imagine what drives parents to allow such marriages to take place.. Poverty and the lack of knowledge yes..but how bad must your situation be and how cold must be your heart that you give your daughters in marriage to such men knowing they cannot handle it.
And as for those who use Islam to justify it, they have no case. Because the marriage of our Prophet to Aisha was clearly an exception, such that our Prophet himself never permitted any of his companions from marrying such young women, as per authentic hadiths. Aisha was in fact blessed with maturity beyond her years.