She totally and utterly was tonight, and I'm not just saying that as a Freddie fan. They had a singing task, and she bitched about Freddie singing for it! And maybe also for *gasp* enjoying it and putting effort into it!
She just wants any reason to bitch and snark about him behind his back to Rodrigo, or whoever else is around that will agree with her, and is too cowardly to say to Freddie's face that she has a problem with him.