I believe a warning may be warranted, and if you feel compelled to do so I think that is well within your right! Moreover if you have feedback on any piece of artistic work, I think that should always be allowed to be shared honestly.
But, conflating your real world experience and inflicting your personal history, your real-world marriage and seemingly your psychological trauma, onto other patrons in the forum of a fantastical visual novel seems a bit out of touch and at least a bit disrespectful to the author. To me, at least.
Wishing you well.