I remember reading this a long time ago. Because of the art and the way Maou is always shown in the shadows in the first 75% of the game, I thought that Maou was actually the main character moonlighting as an asshole. It kind'a ruined the story for me because I spent half the time trying to figure out his timeline and how he was sneaking around. I swear Maou looked like the main character, and I think it was sloppy of the art team to have them look so similar. Otherwise, it was pretty decent.
Looks like I gave it a 8/10 on VNDB after I read it, which is a pretty high score for me.
I have found over the years that this depends on the reader. For example, I can't stand Clannad. 70% of it is basically Seinfield episodes wedged in between actual story. Little bits that don't have any affect on anything. I read the entire thing up until a heroine dies in the afterstory, then I'm like "God dammit, fuck this" because it was obvious the story wasn't going to end anytime soon if they're still shoving climaxes into it. Dropped after 50+ hours invested. Never went back.
I felt the same about MUV-LUV Alternative. For example, at the end, when the girl is pinned against the ship by the alien, it is literally 45 minutes of her just sitting there talking and soapboxing when she should have died 44 1/2 minutes earlier. Or something, anything should have happened before 44 1/2 minutes had passed.
And both of those stories, everyone loves and they don't notice how much filler has been put into them.