Not taking into account the trolls who attack everyone just "4 teh lulz", here's my point of view on the pathology of these people (I'm a guy btw):
Out in the real world, these guys are dominated by women on a daily basis; whether it's by their mothers, or hot girls making fun of them and rejecting them. These guys have probably been humiliated and emasculated by women for most of their lives, and video games have been a refuge for them. Now imagine their outrage (however unjust) at seeing a woman, who represents to them their generalized contempt for an entire gender, "invading" their refuge and emasculating them further. From this point of view, you may be able to at least understand the feelings behind their ignorant comments; whether its taking an unhealthy amount of pleasure in defeating the embodiment of their insecurities and using this feeling to take ignorant potshots at their gender, or losing and being emasculated yet again and taking refuge in the idea that if it was a girl that beat them then they must have been "cheating".
So ignore these poor boys, and don't let them get to you. Instead, you should probably pity them, because they're more afraid of you then you are of them.