Akrodha is a virtue according to Hinduism and Krodha is consider a tamas quality. Absence of anger (akrodha) means being calm even when insulted, rebuked or despite great provocation. Akrodha does not mean absence of causes of anger, it means not getting angry and keeping an even, calm temper despite the circumstances.
I haven't read a lot of mythology or either of the vedas, puranas but from whatever I have read and heard all my life, almost every rishi had huge anger issues, like Parshuram, Indra, Kali aur rudra roop of Shiva and almost any of the rishi munis of that time.
If someone is being called a god, like literally the most supreme being of cosmos, the infinite , one beyond time and space, one would not expect him to have anger issues which are of tamas quality.