I just wouldn’t do it myself
I completely get this. Everyone has different ideas of what is disrespectful/ dismissive, what is a personal affront and what isn't. It's just one of those things, you can't really change the way you feel on matters like this.
I will say...
My ex felt about me, as you feel about your husband. He felt constantly disrespected, ignored, insulted, etc. by the fact that I would talk to people, be interested in their lives etc. He felt that my socializing was at his expense. He tried very hard not to let it bother him, and I tried very hard to do it less.
And we made each other absolutely miserable over it.
What you describe above is, to me, an extroverted man who is friendly and interested in people. He has warmth and gregariousness and people like to talk to him. He probably makes women feel safe which makes them want to be around him, which obviously, as a social animal who is extroverted, he enjoys.
You sound like the kind of person who feels that attention is a finite resource and if he's giving attention to another person, particularly a woman, he has "spent" it and there isn't enough left over for you, or the idea that you don't get all of it, means that he thinks less of you, something like that.
You need to be with someone who doesn't feel a strong need to socialize. You can't make a man like this change. Well - you can try, and you'll make him properly miserable, and he'll inevitably not live up to your standards and you'll feel shit anyway. Which is exactly what happened with my ex and me...
I'm now with a man who's more like your partner. We are very happy together.
Whenever you're with someone and you think "well I just wouldn't behave like that myself, towards him", realize that you are not well matched. You can't make folk change. You've got to take them as they are.