YMMV / Demon Lord, Retry!

• Broken Base: The show is as cliched as it gets in the Isekai Light Novel genre, with a premise that apes off others such as Overlord and How Not to Summon a Demon Lord. Critics are quick to declare how much of a "rip-off" it is, and also decry its low production quality. Fans enjoy the familiar tropes and find that it's just original enough to be fun, and also argue either that production isn't everything, or that the cheap animation also adds to its charm.
• Cliché Storm: There is almost nothing to be found in this series that hasn't been done in earlier anime. Something Kunai has noticed which makes him question if there is more to this new world he is in.
• Friendly Fandoms: With the Overlord fanbase, as this story is essentially "Overlord, but without the salt". The distinction is also enough to illicit a Fandom Rivalry with those who liked Overlord for its darker, morally-ambiguous themes.
• Fandom Rivalry: With the How Not to Summon a Demon Lord fandom, which it most closely resembles in both plot and tone. Fans of HNTSADL decry this show for "stealing" from their beloved show. There's also a less vocal one with the fandom of Overlord, since the two start on almost the exact same premise, but the two shows have almost nothing in common otherwise.
• One True Threesome: Luna is immensely jealous of most other girls in proximity to Kunai, but not Aku, whom she gets along with like sisters. This has created the presumption (leveraged by a scene in which the three peacefully share a bed together) that AkuxKunaixLuna is an extremely likely outcome.
• Ship-to-Ship Combat: Exaggerated due to the fact that Kunai has two harems running simultaneously as both himself and Zero with several girls (and one boy) showing interest in him. And that's not even including characters like Shrimpfry Butterfly, with whom he has only established a working relationship. There are lots of sides for the fans to take.
• Slow-Paced Beginning: One common criticism for the anime adaptation is that, after Kunai gets to the holy capital, the main plot completely stops moving forward. Instead, the series turns into a series of wacky A Day in the Limelight episodes featuring characters like Madam Butterfly, Angel White, etc., and while said episodes are hilarious and entertaining in their own right, it keeps the main plot about Kunai's summoning, the cherubs, and the Satanists treading water for far too long.
• They Changed It, Now It Sucks!: A major complaint from fans of the novels is that the anime leaned especially hard into the Cliché Storm by heavily altering the character designs to be rather standard isekai anime fair, with many noting Aku looking like a blonde Rem, when the novel illustrations gave everybody decently unique looks. In fact, the generic designs and art-style ended up being a major turn-off for quite a few prospective new fans who would potentially overlook the cliche storm if the designs were at least interesting.
• Values Dissonance: Aku's background is akin to the burakumin ("hamlet people", also called "untouchables") of Japanese society. Dating all the way back to the feudal eras, they are outcasts who do unwanted but necessary jobs, such as grave-digging, waste disposal, butchery, tanning and so on. They are discriminated against and considered impure and "tainted" by Japanese, usually forced to live in squalor and poverty. The story having its main heroine character represent this group, and having Kunai both clean her up and state that treating someone this way is unfair, is a major human rights message relevant to modern Japan. Foreigners can appreciate such a message, but it won't resonate as well.