Note: TLDR at the very bottom.

Story - 4

Shikkakumon no Saikyou Kenja is technically not an Isekai anime but also felt like an Isekai anime. The protagonist became the strongest he can be with the crest he is born with but he wants to get more overpowered so he reincarnated himself into the same world but many years later. His aim is to get the strongest crest. Technically, he re-spec in gamer term.

Matty, the protagonist of the show reincarnated himself in the future and got himself the strongest crest but a lot of things in the world have changed. The weakest crest is now understood wrongly as the strongest while the strongest is understood as the weakest. Humanity has also lost the ability to cast spells without chanting. Matty found out that it is the demon’s doing and embarked on the journey with his party to uncover their plan.

I have no issue with power fantasy if it is done right with an interesting story and plot but Shikkakumon no Saikyou Kenja is not that. The show is very simple and predictable. Matty is going to enrol into an academy, geez I wonder who is going to ace the entrance exam? Of cause it is Matty. He was even made an instructor.

Matty is also very overpowered thus he just steam-rolled over everything be it fighting, uncovering mystery or investigating demons. He literally can sense where the demons are or see invisible demons. The show also constantly loves to remind us that Matty is overpowered for some weird reason.

Matty is not only overpowered with his skills and spells. The kings and the academy principal also bow down to Matty a lot just because he is powerful. It almost feels like the kings and the principal have zero wisdom and will be helpless without Matty.

Worldbuilding is weak since the story is mostly shown from Matty's point of view and he mostly narrates everything that is happening. The comedy is not great either, I get zero amused moments let alone laughing out loud. Iris, a dragon who turned herself into a human form tries to pull some comedic moments but I just find her cute instead.

Then if the plot is not interesting, the combat has to be good right? Well, it is very average. Combat feels very repetitive with Matty and Party doing the same thing over and over again without much clever tactical in early episodes. The way they slowly thin the number in a town controlled by demons in a later episode with teamwork is okay but still very straightforward.

The anime is not a harem show despite Matty being surrounded by girls. There are some hints of romance but It doesn’t go anywhere and goes no further than blushing.

Character - 4

Since the plot is pretty “meh”, the character got to be interesting to carry the story, right? Well, no. Since the story is mostly from Matty’s PoV and he is the main character that is moving the plot forward, the side characters have almost no development. This is also bad since Matty is a bland protagonist.

Matty is a monotone character who stays the same throughout the show. He is very overpowered and has a lot of knowledge due to his past life. Matty is also kind of arrogant but sometimes the author tries to force him to do some comedy and it just feels awkward. Matty is also bad with girl's touches like some generic harem MC. If you are this overpowered, at least be a sigma male.

Lurie and Alma are part of Matty’s party and both of them have a tiny bit of character development in early anime when Matty trains them but they stay the same throughout the show after that. Even the way they fight didn’t change. The interaction between the two and Matty is also uninteresting, sometimes even feels distanced. Both of them exist only to support Matty. Lurie does have some romance happening with Matty but it doesn’t go anywhere.

Iris is a dragon girl and an old friend of Matty. She took the form of a human girl to accompany Matty on his adventure and she is the best character in this show. Unfortunately, she also has the least amount of screen time out of the four characters. With her clumsy personality, she tries her best to amuse the viewer from casually bending a sword and scaring people to destroying things.

There are other characters in this show but they are just background characters who make no difference to the story.

Art & Animation - 5.5

Shikkakumon no Saikyou Kenja’s general art and animation are average at best. Overall it looks more like a budget JRPG looking arts and colour usage.

Character art wise, they are okay but they do look like generic budget JRPG game characters. I read the manga a bit and I can see the studio adapted the art style to be the same as the source.

Background art styles are okay, very generic fantasy looking indoor, shops, houses, castles, etc... The details are also fairly decent. What is not so decent is the feel of the town, it feels empty. What is awkward is that there are parts where the close up scene got people around but the view from the sky of the area is empty.

Animations are okay but won’t blow you away. Combat got some slight choreography and animation and is not all close up camera tricks with some background effects. I won’t say the choreographies are good, they are simple and the magic spells are generic looking. The show also loves to add more magic circles and rings to show that the spell is powerful but the spells themselves are not impressive.

Sound - 5

The opening song sounds generic even if it does fit the theme of the show. The ending song is pretty good with its chill and cute vibe.
Background music exists only to support the scene. Nothing fantastic or memorable but the music does fit the theme.

The sound effects are okay. Didn’t notice anything missing but some choice of sound effects such as clashing of the sword and shooting of smaller spells sounded very generic as if they are some stock sounds.

The voice acting is pretty decent. Matty's voice feels a little bit bland or monotonous but the rest of the characters have good voice acting especially Iris with her accent and cute voice.

TLDR:

A generic fantasy anime with a bland story, simple plot and uninteresting characters. Can summarize the story as demons are bad, they mess with humanity's progress so the overpowered protagonist fights them with his party.