Hi! First off, thank you for the kind words about the game, it makes me and the team very happy to hear! :) <3
Your question is a great and valid one! :) The reason why The Guide calls you that is that he doesn’t care about how the player character views themself, which is part of his not-very-pleasant personality (this is also why he asks you your name and then proceeds to ignore it), so it’s all kind of a way of getting his personality across. In the various choices you as a player can make when he addresses you, you can choose answers like “But-“ to attempt to combat that, although it is ultimately fruitless (by design).
I definitely could have included options for the player to answer The Guide in a more clear manner about the subject matter of gender identity and it’s something I’ll look into adding for an upcoming update, so thanks for bringing it up! I really appreciate that. :)
But in terms of what The Guide himself says, that won’t change unfortunately.
Thank you for reaching out and for giving the game a chance at any rate (especially considering that you felt uncomfortable to a degree for which I apologize), and for sharing your viewpoint. <3 Have an awesome day. :)