You could play the super long odds, everything was AWESOME for the past two years, but just turned awful. Then she was only lying now (because "I've been harassed by 'leadership' at GitHub for two years..."). That would paint her in the absolute best light, and it IMHO, rather unrealistic.
You could even play the super-super long odds, and assume everything she said before was a lie (said it was good, it was actually awful) and then things BECAME good recently and she doubled-down on lying and said things were bad.
... in my case, it isn't an assumption. It is a expectation based on prior behavior.
Here's an example:
X: The economy of Southern Portugal during the first half of the 13th century was bad. Do you agree?
Y: I don't know, I don't have enough info and absolutely zero knowledge of Portugal's economy during the 13th century.
X: are you calling me a liar?
Harry: I can't afford to do that
Tom: I don't know, I don't have enough info here to know if you can afford to do it or not.
Bob: Are you saying that Tom is lying, or that he doesn't know his own situation?
The big difference in this case is that while it is totally plausible for X and Y in your conversation to know literally nothing about Portugal, in my example it is not plausible for Harry to be unaware of his own situation without being an idiot. So when Tom 'withholds judgment' on Harry's situation, he is saying that evidence directly from Harry is untrustworthy - Harry is either a liar or an idiot. (I introduced the third person, Bob, as in this case Tom is Horvath and she is not the one responding to you, doubting Tom).
Harry: John punched me
Tom: I don't know, I don't have enough info here to know if you were punched or not
Bob: Are you saying that Tom is lying, or that he can't recognise when he's being punched?