나는 혼신의 힘으로 연기하는 데 안 받아주니까요
= Because they don't appreciate/accept my acting that I do putting in everything I've got.
* 혼신의 힘으로 = 혼신(while body/being)의(of) 힘(power, energy)으로(with).
* 안 받아주다 = not accept/appreciate. (받다 = to receive; 받아주다 = to accept with encouragement, appreciate).