It's all said under the banner of feminism and women's empowerment as well which I find really irksome.
God that would make me positively rage!
I think it's possible that there is a generation of women who will be mostly lost to this, hopefully in a few years time there will see how dangerous 'sex positivity' is if it involves being coerced to accept being choked and penetrated anally on a regular basis.
I wonder if that small age difference helps you to see things more objectively. Even a couple of years can be significant...
If I was late 20s now I would like to say I'd be critical as you are but I'm not sure I would be. It's quite possible that I would be a fully signed up woke member of choice feminism, it took me a while (thank you FWR) to find radical feminism. I think I was always there really but didn't know it. I didn't know we weren't making progress until 5 years ago or so.
This is tough OP as these are your friends and you are probably surrounded. There are groups popping up though, I know of the Cambridge Radical Feminists and other around the mid-20 age who are rejecting porn and 'sex work is work'.
All I would say is it's your life, you're able to say who you want in it or not. You can leave the WhatsApp or just mute if you don't want to draw attention to your distaste on the content, you can brazen it out and say at every possible opportunity that porn is gross, prostitution is exploitation and men with sexual fetishes aren't good enough and need to do better.
Personally I think we need more kink shaming, men with a porn addiction and a casual attitude to the exploitation of women should be at the very bottom of the dating pool and women should know their worth. Strong women are sexy as hell and this kind of BS shouldn't be tolerated.
In true MN style, "No is a complete sentence."