Now, this problem is most evident in the first 7 or so volumes. Yuuji never receives real consequences from any direct mistakes, so there is no room for realistic growth. One of the most likely threats is Kevin - but the merchant treats him kindly and doesn't take much advantage of him, so Yuuji is never punished for such a glaring vulnerability. When he goes out to hunt monsters, or to the city, or to build a fortified defense - they all seem to be the culmination of the efforts and knowledge of other people he talked to, rather than some principle which he had formulated. One big example that stands out is the yurt-thing that he built for his "s*aves". He originally expected one, so he built it following his BBS's instructions with enough room for one. Afterwards, three of them crammed in and said it was okay, so he just left it like that. Never mind the fact that he's okay with them living in these conditions outside his actual modern house just because they're "s*aves" - but that's another issue.

The only moment that you can really say he had a personal growth moment was when he participated in the orc extermination and realized he had to kill them or eventually be killed. Everything else could have been a spur-of-the-moment decision, for all the relevant impact it had on him. This took something like eight volumes to reach. Vaguely around this point the author also seems to realize, "oh shit, I left his personal growth stagnant for far too long", and starts doing things like allowing Yuuji to comfort the elf girl and participate in conflicts in the adventurer's guild. The author also starts including well-written side stories of NEETs being inspired to improve themselves by following Yuuji, showing that yes, he is indeed capable of writing character development. Yuuji himself, however, is still a start-and-stop engine; for example, after comforting the elf, for the next few months it reads more like he just left her alone to play with Alice despite being the only one who could talk to her, and thought about yet more plot-driven stuff like allowing seamstresses into the house to use his sewing machine and the fashion business. At the least, he is still well-meaning; he doesn't shy from hard labor or think himself better than everyone.