Her official reasons for termination and her actions during proceedings would be bad enough on their own to never hire her. They didn't need to know she is 10 times worse, what they knew was more than enough. So they took her (and most likely mainly Kson) at their words that it was all lies and slenders and she got hired purely to stick it to Cover, because Kson was on corpo hate rampage, and it was convenient advertisement for vshojo. Not because she was "proven not to be too much unhinged" like the original post suggested was their hiring process
Because it's very smart idea to admit your company hired menhera on your own recommendation, when your company was already in hot waters after a scandal involving fake auditions that ended up with nepohires anyway. I don't think Kson is smart, but she is also not that stupid