My D who is facing a felony charge related to her drinking tells me I am an extremely negative person.
Because you're not rubbing her back, telling her everything is going to be okay, and offering to pay all her lawyer fees. Maybe you're even doing these things.
She's in a bind and is looking for a scapegoat. It's easier to focus on whether mom is negative than to face the fact that she has a real big problem to manage, and it's hers alone.