It’s not all you wanted though. Buster means that as a courtesy she texts. Her h most likely hasn’t demanded she texts on pain of punishment.
If she doesn’t text because her battery dies or just because she forgets then her h likely wouldn’t be threatening/thinking about divorce. It’s a courtesy text not a mandatory requirement on which the whole relationship is dependent as it is in your case.
You keep clinging onto bits of what people say that confirm in your mind that you are reasonable and excluding everything that hints that you may have to change.
This is your anxiety, not your h, it is telling you that if you don’t have this crutch you will not be able to cope. It is not rational.
If you don’t change and start seeing how unpleasant the environment you are creating for him is and how abusive your demands/threats are then yes, I still hope he leaves because frankly he shouldn’t have to live like that and neither should your DC. Neither should you as it happens but you have some choice about how much your issue affects you and other people.
Your anxiety doesn’t entitle you to special kid gloves treatment from others re your abusive behaviour either. You need to stop thinking that it does. Your behaviour towards him is abusive. You are not entitled to have me or anyone else soften that view so that you will listen and IMO that is actually the opposite of what you need because it is, again, feeding this idea that you get let off your responsibility to others because of your MH which feeds into the anxiety by validating that it is rational.
The three things stopping you from admitting that fact are; 1. That you are afraid this means you will have to change your coping strategies, 2. You believe someone with anxiety shouldn’t have to hear difficult truths and 3. You have given in to the self involvement and entitlement people sometimes do give in to when they are mentally unwell.
Why shouldn’t people be angry at you for abusive behaviour? Why shouldn’t people be more concerned for your husband and challenge your narrative that he is in the wrong for failing to live up to your anxious demands?
You may well be aware you have a problem, but your DH and DC continue to be at risk if you continue to see your anxiety as entitling you to special treatment and as giving you a right to control his social life.