You make it like Deroir basically stalked her and followed her to her appartment to ask questions about Guild Wars 2.I mean it in the sense of it's not the proper channel to offer that feedback. That guy basically found where she'd be hanging around outside of work and made his complaints about what she works on there. It'd be more appropriate to offer those criticisms through a community manager, or an official GW2 forum.
She reacted as she did because she was tired of people finding where she hangs out after work and offering unsolicited advice. The company should be protecting its employees by having internal systems and policies to redirect people to customer-facing representatives when they have complaints. Instead they had nothing and made no attempts to educate her on how they expect her to act in these situations, instead just kind of shrugging and telling employees to deal with it. And when she deals with it like a frustrated person dealing with something outside the scope of their job, she was fired.
She made 20+ tweets essay on a public twitter profile as a follow up of an official Guild Wars 2 AMA session on reddit.
AMAs are literally "Ask me Anything" and she made it clear that her tweets were things that she wanted to say in the AMA but couldn't due to time/other reasons. Of course people are going to react and engage in a discussion, that's the whole point.