Pastlives
I honestly think you, author, are afraid of the comments about the protagonist's personality, him being a controlled megalomaniac bastard, and honestly it was something that I found attractive about MC, something that makes him unique This situation is totally feeling none other than someone absurdly powerful who can influence the among the DxD Universe move to make life difficult for the MC But that doesn't mean I'm not going to stop reading this story, you got me hooked on your original ideas for a Universe that I personally think deserves total destruction, The Devil race are not human beings, so any kind of human notion should not be placed on them
In fact, I really liked the result, besides showing that he is not strong enough and that there are several existences greater than him, it shows, at least to me, that he is not training enough, he researches, tortures, but I don't think he got stronger, so much so, that he used the power of the great sage, through the installation, to intimidate the Rogue.
Cool. By far, I think the best part of the story is how Azrail interacts with the other characters. I was a little worried we'd lose that when Ajuka made his reveal, but it looks like Azrail hasn't lost those connections with those close to him, and the author has an interesting framework in place for the path going forward.