Hindu Media Wiki

Acc to this link in samcharjagat.com, Subhadra, the mother of Abhimanyu is held responsible for the death of her son in chakravyuh.

 such kind of titles mislead the audience and is gives a different wrong perspective from the quoted text in the site. 

so, who is responsible for Abhimanyu's death? 

was it the  pregnant  Subhadra for falling asleep while listening, father Arjuna for stopping the narrative mid way , Lord krishna for not allowing Arjuna to explain the concept of chakravyuh fully or the moon God for wanting his son Abhimanyu back in 16yrs?