Review of the Japanese Mystery Novel "The Locked Room Collector"

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"The Locked Room Collector" consists of five short stories.
The common plot for each story is that when a locked-room murder occurs and the case falls into a mystery, an unidentified man who calls himself a "Locked Room Collector" appears, solves the case, and suddenly disappears.
The method of solving the cases involves the Locked Room Collector explaining the truth by combining only the objective facts provided in each story... but how should I put this? Ultimately, when you see the truth, it turns out the locked-room murder happened because a series of coincidences upon coincidences upon coincidences occurred.
Actually, locked-room murders are something you only see in mystery novels... but what I was expecting was a basic narrative where the culprit devises a devilishly clever trick and the detective uncovers it.
I was taken aback because three out of the five short stories followed a structure where the locked room was created by a series of coincidences rather than the culprit's intention.
Of the remaining two stories, one was somewhat intentional but relied heavily on luck,
and only one story featured a truly brilliant idea from the culprit, but even then, the clues provided were difficult to grasp without knowing Japanese, which was a bit disappointing.
Since I tend to enjoy ingenious tricks, I thought I would find it entertaining, but because most of the stories follow a structure of coincidence + coincidence + coincidence and feel like overly complex puzzle-solving, I personally didn't find it fun and cannot recommend it.