Unexpectedly good
Manga
Manga that either have weird ideas (maybe even morally wrong/illegal), topic that not many people are interested in (eg, niche game etc) or low rating but are actually quite decent.
Will update as I go along.
Will update as I go along.

Manga, 36 vol, 1991
Me:-
Author:10
Mahjong but this manga is universally well rated anyways.

Manga, 2 vol, 2022
Me:-
Author:7
MC took a long time to grow a spine but whatever.

Manga, 7 vol, 2019
Me:-
Author:8
VERY uncomfortable. A downright disgusting age gap. However, the character writing is quite good from what I remember and the art style gave it a relaxing atmosphere to it.

Manga, 4 vol, 2007
Me:-
Author:9
Universally high rated manga but still a very weird premise.

Manga, 4 vol, 2015
Me:-
Author:8
MC able to read minds just to find out he got NTR’d LMAO. But the journey is decent.

Manga, 3 vol, 2013
Me:-
Author:8
Yes the MC does get NTR’d. It’s uncomfortable but the story itself isn’t too bad. Mostly about the MC moving on by starting a new life. It’s a decent plot all things considered.

Manga, ? vol, 2019
Me:-
Author:10
Honestly thought this was just gonna be one of those typical villainess nonsense. Instead we get an amazing thriller mystery with conspiracy theories and an incredibly well written cast of characters. It feels like Pandora Hearts. This puts every other “villainess revenge” stories to absolute shame.

Manga, ? vol, 2023
Me:-
Author:10
Putting this here because how much this got meme’d to sht. But it’s unironically incredible. It’s doing everything right so far. Has the pacing of newer dark shounen that focus on getting to new arcs quickly by only having 1-2 chapter break between them (think Dandadan, Chainsaw Man, etc), pure cinematography with the panelling and art style, CSM-esque character interactions, interesting power system and an overall high potential plot. Both the major arcs have been fantastic so far.