What bugs me the most is that this guy has three other written series, all of which are either isekai or tensei.
Like, normal writers can think of completely different genres or even settings. Meanwhile, some guy goes “Hmm, I just wrote a story about a guy going to another world who gains a harem with cheats. I wonder what I should write about next. I know! A story about ANOTHER guy going to ANOTHER world who gains a harem with cheats!”