Just my personal opinion...
I've read the Light Novel. The first two volumes were... OK, i think..., but later volumes frustrated me. The story got more and more ridiculous. The author seems trapped in his own "overpowered MC" concept. He wanted to create tension in the story (in battle), but because of his "overpowered MC" concept, the MC become looked stupid. In battle, for no apparent reason, the MC seemed to "forget" that he had the technique to finish the fight easily. But the MC didn't use it, as if he never had the technique. Instead, he used the hard way. The author also often forgets the "rules" he made in the early volumes. For example, to communicate with people from otherworld, you must have the skill called "Language Comprehension". But Kaori, without these skills, could talk to Princess Lexia who was a person from another world without any problems. Please... author-san... (I thought that this LN was published without editing process by the publisher, or maybe the author got a bad editor).
The silliness is not only on other worlds, but also on earth. MC beat a bear barehanded in front of a large crowd, and ... no one asked. Lol. It would make more sense if the MC beat the bear using tools or weapons. But the author chose to use bare hands. Or... the MC destroys the volleyball court using the ball, and what did the opposing team say? "We forfeit"..... that's all. Nobody asked. Lol. It's ridiculous.
In the beginning, this novel had great potential, but the next moment its going downhill... sigh... 🙁