This manga is your kinda generic Isekai with your absolutely overpowered main character with his harem and friends and so on. If we're being honest, I'm a really big sucker for isekai for really no reason, it's definitely one of my guilty pleasures, which is kinda what's boosting my overall score up to a 5.

Story 4/10
The story isn't very good at all. The main character used to be alive 200 years ago and was the strongest in the entire world. He defeated the demon king, but decided to reincarnate afterwards because he was shunned by society. When he wakes up, he has nearly all his former power and knowledge and is of course the strongest in the world as magic had gone downhill over the last 200 years.
However, when he wakes up, no one remembers him and there's no real justification. Also amber eyes (the MC's eye color) are now viewed as weak instead of absurdly OP (as they used to be), which is also not really addressed very well.

Art 5/10
Generally I always give high scores for art; however, in this manga, the art is just mediocre. It's very boring, there's no real beautiful art anywhere, which there normally is especially in magic mangas like this.

Character 2/10
All the character's in this manga kinda suck. There's the constant trope of "wow I'm gonna be a dick to the MC so he can stomp on me later," which I guess the author believes will never get old. The main character is your normal aloof-super genius-asshole, but still has the spirit to really help those around him for although he's an aloof asshole.

Enjoyment 7/10
Like I previously stated, I really enjoy isekai manga, so despite this having almost no appealing points, I still really enjoy it.