I understand your frustration, and it's completely normal to feel that way sometimes. You have every right to share your opinion, that's true. However, I think that instead of presenting it as a complaint, you could perhaps make it as a kinder suggestion. It's often easier to encourage people to do their best through constructive feedback rather than criticism.
Personally, I really admire visual novel creators. Programming, designing, creating characters, and building an entire story can't be as easy as it might seem from the outside. Just a suggestion!;p