According to what the accuser said, there's only three people who know the truth. We don't know the full story so we aren't in a position to determine validity. The timing of the charges, the lack of other similar accusations from others, plus the inconsistancy with what has been known of his character and behavior raises questions, but that doesn't necessarily mean she isn't telling the truth.
As for bots, the way they simultaneously whip out the same meme theme is odd. While influence from other social media and news outlets is one explanation, the fact that they don't cover other subjects within their agenda at the same time is curious. Their standard rants and replies, lack of understanding of what they themselves post, and unwavering need to simply antagonize are too identical. They aren't arguing, their attacking. They're all oblivious that many of their shared go-to attack points offend no one. Hillary is a common one. Not a pip of support for her, yet the alt righters keep harping on her as if it's insulting. Same with Bernie Sanders, socialism, David Hogg, etc. Ironically they are cornering leftos into defending them. Strange way to convince anyone of a certain pov, by making them in effect support that which they do not. That they all insist on doing this is not normal.
