it comes across as insecure and nasty to me.

It doesn't come across like that to me at all. Not even close. I think you're projecting some of your own views onto her, or are just twisting her beliefs/intent to suit your own views. Realistically, that woman would have nothing to gain from even being nice or honest towards men. A pretty girl would pretty much be Hitler and still get plenty of suitors online. There was really no incentive for her to express that kind of compassion towards what men experience online. Certainly not when there are women plenty of other women out there who would quickly label her a gender-traitor for doing so. I don't see how that is insecure.

I am so fucking far from this nasty attitude and did not give that vibe at all.

Well, that's your perspective. From my point of view, I felt that same vibe. So, maybe you're judging that comment too harshly? If I can be wrong about your intent, maybe you can also be wrong about hers?

Ugh nothing worse than women who put down other women to appeal to men, nothing.

Really? Nothing worse? With all the liars, cheaters, haters, narcissists and abusers that plague the dating scene, that is the worse? Because she is acutely aware of some negative behaviours that women actually do, or because she is verbally critical of those behaviours, she is the worse person ever? Because she expresses empathy for something that men experience, or expresses a disapproval towards something that other women do, that makes her a "gender traitor"? Would doing or defending shitty things, for the sheer benefit other women or adhering to female solidarity, really be any better? How is this segregated "chicks before dicks" mentality not sexism?

You do realise what a 'nice guy' is right?? They are just as sexist and hateful as the kind of men they deride

Woah... no. I do not believe that at all, and I honestly feel sorry for you if you genuinely think men trying to be nice, kind or empathetic(in general or specifically towards women) are just being "hateful" and "sexist". That is a very twisted and unwarranted way to look at those men. I do not project that aspect of malevolence, dishonesty and sexism against them and neither should you.

even worse because they assume women can't make their own relationship choices and all need a good man to rescue them.

That's some pretty loaded assumptions you're making there. I don't quite understand your reasoning, or even why you would try so hard to both vilify and twist their beliefs/intentions with such vitriol. Even if this was the case, I don't see how men seeing a woman in need of "rescue" makes them sexist or hateful, or how it somehow assumes that women "can't make their own relationship choices"(also, there are fundamental differences between being critical of the choices women make and assuming that women can't make their own choices, treating the two as being the same is pretty dishonest). If you saw someone and perceived them as in need of help, even feeling a desire to help that person, how would you feel if others then labelled you a despicable piece of shit for ever thinking of that person needed help in the first place? In what other situation would this ever be the case? This seems like nothing more than some very undeserved and misdirected contempt and prejudice.

Maybe you need to talk to women about their experiences with self proclaimed 'nice guys' and realise they are the exact opposite of what they claim to be.

I have talked and listened to a lot of women about their experiences with nice guys and, most often, found their reactions to be completely unrealistic, unjustified and out-of-touch(if not even conformist). Either they were just trying to justify shitty behaviours with even shittier logic, or they simply vilified those men in any way they could to absolve themselves of any wrong-doing towards those men(feminists are especially bad for this, spinning pretty much anything a man can do in to sexism and hostility towards women whenever it suits their needs, and with plenty of young women blindly following whatever man-hating propaganda is popular at the time).

Maybe you need to talk to men about their experiences with being nice to women, and realise just how misinformed, misguided and needlessly hostile you, and other women, might actually be towards such men?