Am I Actually the Strongest? is not the worst isekai ever made, but it's not worth remembering either. The premise has potential, and Charlotte is a genuinely good character, but the execution is generic, the animation is weak, and the protagonist is boring. If you're a diehard isekai fan who just wants more of the same, you'll probably enjoy this well enough. If you're tired of the genre, this won't change your mind.