So in this instance, men didn't lose any rights, because this was never a right in the first place.
Except that - even if we accept your assessment of it - you admit that for thousands of years it was indeed considered a right. And that for just a few decades before a court - after much deliberation - deigned to clarify that it was indeed a crime, it was still an assumed right and never prosecuted or punished. How many men were sent to prison for raping their wives before that judgement?
These pathetic arguments will not wash. Men have subjugated women for thousands of years. They still do, to a great extent, even in the UK. Even more so elsewhere in the world. The idea that the poor men are being treated unfairly when the balance is redressed even slightly, when women's safety is protected just a little bit (although it does not stop men killing and abusing them, in a way that is incredibly rare for women to do to men), or that them having some rights which are often basically pretty much unenforceable to at least technically be able to have the same privileges as men in terms of careers etc, is somehow unfair to the poor men, is absolutely laughable. And no amount of whataboutery is going to convince anybody to get out the tiny violins for how sad it must be for you all to have to actually compete with women at work, to have to accept it when they say "no" and turn you down, to be expected to do your fair share of work in raising your own children, to not have women pander to your every need and view you as some sort of superior beings that we should aim to please and impress, to tell you that if you expect us to be interested in your opinions or company remotely then you'll have to treat us as equals, otherwise quite frankly you can fuck off to the other side of fuck.
Woe is me for not being allowed to treat half of the human race as inferior to you anymore, or an unwillingness to accept that STILL - despite the law - men are the largest danger to women that exists and men are responsible for this, and women will NOT feel guilty for pointing it out or demanding protections from that, and no it's not the same as wanting to be able to hang out with your male mates at a golf club without having to tolerate the presence of women so that you can behave in socially unacceptable ways in private. It will not wash. So just stop. Nobody is buying it. It's over.