@loveyouradvice
I don't think this will be behind us quickly, or even in our lifetime (I am quite old, though). Because:
There's money in it.
It mainly disadvantages women and children.
The mechanisms for putting things right are clunky. For instance, we know that failure to provide certain sex-segregated entities is illegal sex-discrimination, but this can still only be enforced via a civil action.
Most of all though, this is a metaphysical belief system with powerful meme-spreading qualities. (The last time this happened was millennia ago, yet that belief system is still hanging around like a bad smell, dictating our Sunday trading laws and who can sit in the Lords.)
Transgenderism is resilient. It appeals to people's love of arcane knowledge with its sci-fi vibes, and gives them a warm glow of virtue. It's captured many major institutions and is prepared to fight dirty. It proselytises to the vulnerable, and brainwashes the young.
Our only hope is to reduce it to the status of any other religion in a secular state, rather than what it is at the moment - the state religion of a theocratic state.