In the process of adapting a manga to the serial approach, some productions seem to struggle to conceive that adaptation is a more complex process than simply copying and pasting manga pages and hoping they will work in the same way on screen. This is the problem with an anime that could have had great potential, such as Junji Ito Maniac.
Indeed, in the development of the series, they opted to reproduce the original pages as faithfully as possible, stripping them of the soul given by the author and without caring to translate them into a different communicative medium.
This is unfortunate because animation could allow for the sublimation of master Junji Ito's haunting stories, and the lack of this effort makes the series incomplete, empty, and inconclusive. Moreover, there is a lack of overall cohesion and the pacing is erratic. The episodes are interesting only because of the unique material provided by the manga's sources.
Overall, the product, while not tremendous, comes across as a simple copy of the original manga with no soul and no real point of existence, as it adds nothing to the master's work but, on the contrary, takes away some of its charm.