I genuinely don’t understand why you think people have been hostile? People have said they liked your link, and politely pointed out that more people are likely to click on it if they are given a heads up as to what the content is. Personally I am unlikely to click not because I think it’s dodgy, but just a time/ priority thing. Loads of threads on Mumsnet so more likely to look further into the threads that it’s clear what they are about.
That first post that you interpreted negatively was actually, I think, intending to welcome you and help you to get more ‘reads’. Other posters, wanted to help to see that poster was being helpful, and perhaps also defend that first poster from what we saw as an unwarranted criticism.
Kindly, but could your bad week have caused you to be hyper-vigilant to ‘hostility’ and being over alert to it, seeing it when it isn’t there? I’ve certainly had episodes of this in the past.
I’m really sorry you’ve had a bad week. I really hope you can see people were trying to be helpful and that you post again.