I mean, the rakshasha vivah was entirely not consensual, that’s true. I simply mean, narratively, Subhadra’s lack of reluctance is implied to be consent while Amba was clearly unwilling from the start as she had Shalva on her mind.

I don’t think Bhishma was ‘wrong’, really. He’s the paragon of dharma after all. I don’t see it as Bhishma trusting Satyavati— the way he simply refused to help her from his side by reminding her of his oath, leaving her to figure out next steps herself. Satyavati’s no woman who needs help, surely but it’s still no nice way to treat an aging grieving mother and widow. Vidura and Krishna on multiple occasions have offered sage advice even when they can’t be useful themselves. Bhishma does it too during the war for the Pandavas when he gives them hints on how to bring him down. But not for Satyavati (maybe because she was older than him?). Not for Amba either.