Bahadur Shah Zafar was not a capable son of a capable father.
Explanation:
Although Bahadur Shah Zafar was a better and more courageous ruler than many of his predesessors he was not an administrator per se. He was more of a poet and an artist at heart than he ever was a king and it showed in his administration.
His father was a weaker ruler who would not think of revolting against the British, which is something that he did and had to suffer for it.
Zafar was instead an idealist king who found himself in too weak a position to ever hold power well enough.