Is your husband unable to understand the ways a hypo affects you? There's a very big difference between genuine instability and the changes we suffer because of low blood sugars, but not everyone is able to disassociate the two. Despite this, I find it distressing that he's describing your hypos as an 'unstable condition' rather than helping you when they happen, and that he uses them against you in arguments.
@Juicyj's advice on basal testing's good. And have you looked at the clip she sent of the reporter's on air hypo yet? Have you shown it to your husband?
Ultimately, even though we thrive if our husbands are both sympathetic and helpful, it's up to us to find a way to live best with the lovely gift of T1. (I find irony helps.) I'm aware as I write this that having another person who cares that I'm well takes away some of the fear of a bad hypo. My husband and I lived apart for a year. During that time I had a few night time hypos that were unnerving. I think it was fear of them that affected my decisions about our relationship, and it's one of the reasons I like irony.
We're back together now. I'm currently trying to get to grips with changes in insulin needs that have occurred over the last few months and we've just talked together about strategies to solve some odd readings. I wonder sometimes what life would be like now if we'd not reunited. To paraphrase what Chaucer said, life's certainly uncertain. I wonder, too, what life would be like now if I'd been on the Dafne course back then rather than a few years later. Even though, like you, I've been T1 for a very long time, the ways it's managed have changed enormously. Insulins, testing equipment, carb to insulin calculations, etc etc. The Dafne course brought this old dinosaur up to date and enabled me to exercise far more control over the ways I live with T1. Have you got a similar access to ways of assessing carb values and ratios to insulin in Chennai? I'm attaching a link to an online version. Each region in the UK seems to have renamed the Dafne course; this one' called Bertie.
https://www.bertieonline.org.uk/
I really hope that you find a good way to change the situation you're in!