Good list and good subject. Supergirl getting beaten by Reign was good, and I always enjoyed Black Scorpion losing, which happened often. I think my favourite from your list is Cheryl Ladd being so easily beaten by the fat woman in Charlie's Angels, although I always wished that scene was a lot longer.
I'm interested by your #10, Batwoman beaten unconscious by evil sister. I've never seen or heard of this. Any links, please?
I would also like to add a some:
1. Black Scorpion is the episode 'Roses Are Red, You're Dead' gets KO'd by two henchwomen. In this one she is out of costume, and instead wearing a skirt and blouse.
2. Black Scorpion in 'Zodiak Attack' takes a prolonged beating from multiple villains. Two of them are male, which might have spoiled it for me (Not my thing at all), but fortunately the female villains administer most of the beating, including the final KO
3. Baywatch 'Homecoming' where Alexandra Paul gets soundly beaten by a female terrorist on a yacht, KO'd and tied up.
4. Lost Girl s02e10 'Raging Fae'. Main character, Bo, beaten up in MMA cage.
5. Xena Warrior Princess 'Path of Vengeance' where Gabrille fights the Amazon Queen (or whatever, I didn't follow the story), and gets beaten unconscious.