Review Detail of Ossa_Bellator in Abyssal Lord of the Magi World

This novel was very good at the start and I found something that could have been comparable to Warlock of the Magus World however the changes in the main character are very stupid and put me off. The mc was an Abyssal Demon Lord in his previous lives in which he has massacred billions and trillions of lives but 'suddenly' in this new one, he gets so angry if some random person from his clan is killed. He's supposed to be merciless and cunning, so instead of offending a highly powerful being, he should try to find ways to ally with them. Why should he care about the death or attack on a person that doesn't even affect him? This could have been an amazing story but instead, is ruined through senseless character changes, it would be much more interesting to read his life when he transmigrated into a demon of the Abyss. Hope author takes it into consideration.