How To Deal With A Coworker With An Attitude
Suggest reassignment
If all she brings to the table is negativity, all she mentions are problems, and all she does is complain, you can tell her that if she’d like to be reassigned to another project, since she seems to find this one unmanageable (a nice little dig suggesting her skills are lacking) she’s welcome to move to another team. That reframes the idea of her moving to another project as her failing, which she doesn’t want to do.