Wow is this main character unlikable, which for a show with only one central character is a pretty major blunder. He claims that he's making himself OP, but like, buddy, you're just relying on the secretly OP skills and items that you scoffed at and then got forced on you. None of this is due to your efforts. There were times where it felt like the story was hinting toward an unreliable narrator (like how the different cliques at school are drawn a little differently, as if he's making divisions that don't really exist), but ultimately the anime feels too earnest for me to have any real hope of the story turning that way (if anyone is familiar with the source material, please correct me if I'm wrong!)
Ultimately it's fine for what it is, which is a popcorn isekai anime with no substance backing it up. I can see someone enjoying it, but only after exhausting other, better options. I give the premiere a 2/5.