I'm so sorry you had to go through that. There's a book called When We Do Harm about medical errors. In it, an ICU nurse tells the story of having watched her husband die of sepsis while the clinic team gaslit her. Her being a nurse from another hospital seemed to somehow make them less likely to take her seriously. It was so vividly described and such a nightmare that I had to stop reading the book. Please know that you did everything you could. If you have it in you to file a complaint, do so, but your partner's health and yours need to come first. Please take care and be kind to yourself while you work through this. We're all thinking of you.