MN has definitely become more anti-child over the years.
This thread is nothing new and some of the answers are nothing new, but I do think a contributing factor to this site changing is that it is a big target for bot farms and for those who know how they work, certain answers are not surprising.
Back to the overall OP, adopting in the UK is very, very different to having a biological child, it really is a tough journey and one you need to think very hard about.
Overall though, life is tough. There's this weird perception that child free women live carefree lives of riches and that's not necessarily the case.
I would absolutely have my children again in a heartbeat. The most shocking thing about parenthood, IMO, is how fast it goes. However, I was fortunate to have a partner who is a decent human being, so I am able to maintain/career/hobbies and it is very important to me that I role model that to my daughters, because I want them to have the same.
Too many women, whether they are mothers or childfree spend their lives living for other people: parents/partners/children/family/work colleagues. You have to look after your own happiness in life and not depend on others to do it for you.
Finally, if you are living in a state of permanent anxiety, please seek medical help as this isn't normal.