To put it simply, this novel has flaws as vast as Jupiter. I concur with most readers that after Volume 1, the quality takes a nosedive. The criticisms mentioned by others, though some might be biased, address common issues they've pointed out (like a lack of consistent development). It's true that the author was pioneering the overpowered protagonist genre during its early days, which influenced the trend. While I appreciate the originality of his first volume, I believe his pre-planned ideas depleted after that, leading to reliance on clichés to fill the narrative gaps.
Now, let me address the readers on Novel Updates. I commend your discerning nature; those who visit this platform are highly knowledgeable and can spot the flaws effortlessly, often having honed their skills through anime and manga. However, I remember my own journey as a beginner, where I enjoyed some "so bad, it's good" shows despite feeling unsure. As I gained more experience, I realized those shows were indeed poor. Similarly, for you at Novel Updates, the majority of you have a keen eye for inconsistencies and contradictions. It's a pleasure to have such a community of experts.
To the minority who might be new to the site, I urge you to examine the flaws pointed out here against the novel. Trust me, the problems are significant and might not be apparent while reading. And don't mistake OP elements as the sole reason for the novel's shortcomings; rather, it's the lack of competence from the author that makes it stand out negatively. Remember, "bad" writing isn't solely due to overpowered characters; it's the author's inability to craft a well-rounded story that counts. So, when evaluating, always trace the root cause, and you'll find the real culprit: incompetent storytelling.