In White Fang, White Fang is made leader of Mit-sah's team, why doesn't he like it?

White Fang hated being leader because he was hated...... the other dogs attacked him constantly, and if he fought back, Mit-sah would whip him.

From the text:

Had there been in White Fang’s nature any possibility, no matter how remote, of his ever coming to fraternise with his kind, such possibility was irretrievably destroyed when he was made leader of the sled-team. For now the dogs hated him—hated him for the extra meat bestowed upon him by Mit-sah; hated him for all the real and fancied favours he received; hated him for that he fled always at the head of the team, his waving brush of a tail and his perpetually retreating hind-quarters for ever maddening their eyes.

Being sled-leader was anything but gratifying to him. To be compelled to run away before the yelling pack, every dog of which, for three years, he had thrashed and mastered, was almost more than he could endure. But endure it he must, or perish, and the life that was in him had no desire to perish out. The moment Mit-sah gave his order for the start, that moment the whole team, with eager, savage cries, sprang forward at White Fang.

There was no defence for him. If he turned upon them, Mit-sah would throw the stinging lash of the whip into his face. Only remained to him to run away. He could not encounter that howling horde with his tail and hind-quarters. These were scarcely fit weapons with which to meet the many merciless fangs. So run away he did, violating his own nature and pride with every leap he made, and leaping all day long.