I mean a Great Elf that's actual experienced the world, if someone just stays in the forest their whole lives and never contacts the outside world, the only knowledge they'll have is of the forest.
I don't really mind if the mc ends up with a girl or guy or stays single. Also I prefer to belief they their going after the back door and not his thumbtack.
It's not a harem. Novel updates has shit tags that are regularly mislabeled, it's always best to check the tags for the JP version, which completely lacks the harem tag.