Devilman at its most basic is an action horror manga, and not a particularly tasteful one cause Nagai seems to have been more interested in how far he can take things rather than how well can he do it. There is a lot of over the top violence in this, characters get their limbs torn off, they get cut in half, heads get decapitated and at the same time Nagai with in some sex jokes and random nudity. Despite the attempts at being shocking, in the year of 2000 and 18 it's anything but. Since the 70s there have been so many movies, comics and video games that are filled with over the top violence and gore that when you see the stuff that goes on in Devilman it's hardly impressive. The simplistic art style doesn't help it cause it's too cartoony to take anything seriously. It reminds me of Leiji Matsumoto and his characters straight out of a gag manga trying to look all sad and depressed. It just looks dumb and silly most of the time. I find it harder to empathize with the characters in what would otherwise be a very grim and depressing situation when they look like caricatures more than anything. On occasion the manga has some quite cool, dynamic and emotional panels and spreads that look quite memorable but otherwise it's pretty sloppy with a lot of nearly pitch black panels and scarce drawings.

The art style though is not the only reason that keeps the manga from being all that emotionally impactful as majority of it lies in the writing. For the time it came out the idea of Devilman was fresh and unique, in a way such a story is still rare cause we don't often get an anti-war message that condemns both sides and instead of doing the part where everything is spelled out it takes things to the absolute extreme and makes you watch what it leads to instead of looking away. That's a large chunk of the reason I gave it a 7, that and the pacing and some humor occasionally. That's about it for the good things I had to say about the story, the rest of it is rather garbage. To start off the characters are awful, even Ryo and Akira are barely defined so watching them do anything is boring, at least Ryo's craziness from time to time can be entertaining. With main characters being wet sponges you can probably imagine how good the side characters are. For a manga that tries to be shocking you need characters the audience would care about, you can't just shove a little girl we know nothing about into the story and have her do nothing for two pages and then she's dead and it's a very dramatic and sad moment that this girl is dead at such a young age. Why even bother trying to set it up at that point. This applies to any character, even Miki is a nobody, go ahead and try to describe who she is as a person, I tried and all I can come up with is that she's a tomboy who's into confident, domineering men yet she's bizarrely important for the plot and probably single most "impactful" moment of the manga relies on you caring about her and her relationship with Akira than never even really happened.

Overall, if you don't look at it too closely, it's just a short, fun schlock manga that to this day has some bold plot points that's probably worth a read but it's no masterpiece and it's not as impactful or dramatic as it tries to be