[theorique]

I don't think this woman went through a rational process of "deciding" that she was upset with YouTube because they are alleged to have cut off the income on her videos.

She snapped, identified the target of her rage, and took violent revenge.

[jacquesm]

She did not take revenge on Youtube, she took out her (unjustified) murderous rage on employees of Youtube. People who are even more dependent on Youtube than she ever was.