My basic take is that is was the Right that kicked this all off, specifically Thatcher. She was the first politician, certainly the first party leader and PM, who explicitly encouraged individualism ("no such thing as society", Harry "Loadsamoney" Enfield, yuppies etc). Sure, she was a God fearing Christian, and socially allied on the Mary Whitehouse fringe, but her breaking of the social contract between the state and citizens, pushed us into selfish, isolated behaviour patterns. I really do think this would have been the acorn laid which grew into men trampling all over women's boundaries. A really good example of The Law Of Unintended Consequences.This was likely encouraged further by Thatcher's education reforms which laid the ground for academies and trusts, and schools outsourcing RSE teaching to third parties, these now being the Stonewall/Mermaid outfits.
So, four decades plus of atomised society, everyone out for themselves, less and less obligation to temper hyper individualism with communitarian needs and preferences.
Then we move on to Blair, he had nothing negative to say about hyper individualism, indeed encouraging it further (pretty much Thatcher 2.0 here), typical liberal left refusal to moralise or judge, and was instrumental in the rolling out of legalistic frameworks in society solidifying these freedoms and further away from anything that could be viewed as bigoted criticism, racism, sexism, homophobia. As encapsulated in the GRA 2004, and EA 2010.
So, the market driven hyper individualism of Thatchers 80s was reinforced in law by Blair's 90s and 00s legalistic protections of freedom of expression.
And so I see the consequent car crash of trans chaos in 2023 as both a Right and Left mess.