Responsible for Gregor's death?

Gregor is responsible for his own death because his buggy-ness is merely the physical manifestation of who he really was anyways.

the realization that his father..his family does not love him, ? so i guesss you would say he is responsible, yes.

the milk theory is completely ridicules. gregor starves himself to death in order to prevent the suffering of his family. he realizes that they are better off without him. the family not loving him does apply because it is once his sister betrays him and says he is just hurting them that he realizes he is not changing back and that he is isolated from them

Gregor died because he was to mentally weak to live in his new form. He didn't get food for him self he was picky. And denial he couldn't even face reality at the beginning. He wasn't mentally strong enough to move on. He could have left and went into the wild way before he had that apple lodged in his back side. And honestly the odds of surviving as a giant careless bug is almost zit.