IMO, men who dismiss Mumsnet ("its a load of old man hating harpies" "they've got an agenda "I bet half of them are lesbians" etc) and feminism as a whole, actually just don't like or respect women all that much. They don't credit them with intelligence or informed opinions and they just simply think women are a bit inferior, really.
Clearly your DH is in this camp. You're (understandably and bravely) making light of this (and a lot of posters have responded in the same vein) but I don't think you are as light hearted as you sound. Feeling ground down by this on top of other stuff and not wanting to go home...
Maybe it would be worth starting a new thread about your relationship as a whole, and your DH's attitude towards you. You are 41. You're too young to live the rest of your life with someone that makes you unhappy, or someone who doesn't respect you or value you. His attitude to your appearance in public is just one manifestation of how he thinks you should behave how he tells (literally - tells!) you to behave. He doesn't really seem to care if you feel sad or unheard, which isn't the action of a loving partner.
I also think men like this are not good role models for DC. Do you want a DS growing up and treating his girlfriend/wife like this and saying these things to her and that they should do as he tells them? Do you want a DD to think it's normal for men to treat her in this way and she should cover up because a man told her to (assuming DC are heterosexual Ofc
).
This is the very reason men like your DH hate and fear MN and feel defensive, because their shitty attitudes and behaviour are exposed as not the norm and women are encouraged to expect better and be treated like equals and not possessions or misbehaving children.
PS I'm not a man hater with an agenda, I have a DH and DSs who I love very much, that's exactly why I expect men to behave better than your DH does, towards you.