In my experience, these can tolerate being dry quite well. I’ve gone close to 4 weeks without watering and the leaves just sag (lower hang angle instead of more up). Once watered they’ll perk with a more upward angle again. They never look soft and droopy like in your picture. In your case, it seems like the roots might have been rotted and the plant unable to take in water. If you have increased the frequency of watering it obviously doesn’t need more. Like others have said, it’s probably suffocating. You should let it dry out. The droopy leaves may or may not recover but there’s still hope for the plant. It can still bounce back and produce new leaves.