For a long time, Akela was used to having weak subordinates.
Since becoming Legolas's contracted beast, his life changed in numerous ways. By leaching on Predator's brilliance, he became a Grade D beast, something that seemed extremely elusive to him before.
In so doing, he easily exceeded Warg who was once his superior.
Originally, he thought that becoming Legolas's contracted beast was the worst occurrence of his life but in hindsight, this was a blessing in disguise.
He literally fulfilled all his life goals already since becoming Legolas's beast.
At a young age, he once dreamt of becoming an Alpha Wolf who led his own pack but due to the competition around, he could not fulfill his dream.
This changed after he met Legolas.
The same thing for his Grade D dream, it was every beast's dream to become as powerful as possible despite limited talent and he was no exception.
Again, due to meeting Legolas, he fulfilled this dream.
