Man, it's really sad to see the story devolving and changing so much from it's initial premise.
It's completely understandable people will feel frustrated, or at the very least find it strange. Having side stories is completely fine, world building is fine, but shifting the focus this much is just weird. This was a slice of life/romcom focused on a dude and his robowaifu, it's probably what attracted most of the people to the story, why not keep it that way?
My only guess is the author lost interest in writing about the main couple, and just wants to do whatever.