он решил, что у него нет силы воли,

он решил, что у него нет силы воли, раз он не может заставить себя сделать то, что он не любит

Результаты (английский) 1:

He decided that he did not have the will power, he cannot bring himself to do what he does not like

Результаты (английский) 2:

he decided that he did not have the willpower, since he can not bring himself to do what he does not like

Результаты (английский) 3:

He had decided that he had no force will, once he could not force themselves to do it, that he does not like