I'm sure someone will have shared this with you already, OP - I'm not going to read the full thread as I've no time - but my understanding is that this is illegal: workplaces are obliged to provide single sex toilets, and the recent Supreme Court judgement has confirmed (as if this ever should have been required) that single sex means, well, single sex.
To the poster on p1 saying to "get over it" - and the inevitable others who I'm sure will have intervened in subsequent pages - have some insight, empathy and common sense. Stats unambiguously show women are substantially less safe in mixed-sex toilets in any context.
Here's a thought experiment for you.
Transfer OP's situation to any other protected demographic: a person of colour, disabled individual or gay man, for example. A situation has been created in which they're facing regular and sometimes intimidating verbal abuse related to their respective protected characteristic. Think about the language that would involve. Notice how unacceptable it (hopefully!) feels even to think those words as a thought experiment. And think about how, 50 years ago, many people dismissed any concern about such abuse as unjustified.
Now think about how women are facing this and a measurable impact on their physical safety.
What makes women's rights so very different?
Your answer is proof that this is an issue.
If you think, "Nothing. Nothing does," you're right.
If, conversely, you default to a string of unthinking justifications - think back to those justifications against racism and ableism and homophobia of yesteryear, and be honest about how they sound now. Do they hold up? Do your reasons now hold up? And perhaps look at yourself very hard in the mirror.
(PS If your answer was "trans rights" and "inclusion", advocate for mixed-sex spaces for all trans people and their allies who are indifferent to these, such as yourself. Campaign for women to have the right to choose whether they share their spaces with males. If you give them the opportunity to use these, and the majority embrace it - great, problem solved! No exposure for trans individuals, and single sex spaces for women who feel vulnerable with strange males. If women, given the choice to consent to mix-space spaces don't consent to use it? Well, right there is your evidence that there is a clash of rights. And this needs consideration, and care. But not an indifferent, wholesale replacement of women's rights with a "more important" demographic's).