I felt that Ozai had lost a lot too, even if it's by his own evil. Maybe Ursa was his love and after she left him, his emotional insecurity just grew into madness. Tell me if you agree!
Ozai's Lament
She was a winter butterfly
Too fragile to hold in my hand
She was a petaled flower
Too complicated to understand
She was the gentle sunshine
That I couldn't quite command
She was the spice of life
Without her, all is bland
I look towards the garden
But I know she won't be there
I look upon an empty throne
And swallow back my despair
I look towards my children
Devoid of her loving care
I look towards my future
A half of a broken pair
We met as little children
Upon seeing her on sight
I felt my face grew red
My chest had gone so tight
She saw me walking over
And bowed with a smile bright
Surrounded by spring flowers
Such a lovely sight
The years did past and finally
We were bound as man and wife
So why did she run away
When I needed her in the strife?
I knew the weakling was to blame
It should have been him to leave my life
I knew this without a doubt
By my father's body, I found Zuko's knife