u/Weak_Music_444

I just got this job as an intern, the female who interviewed me actually became my supervisor, so she knew who she would be working with.
I am a 20 year old female and so is she, difference is she just graduated which led her to get promoted from INTERN to supervisor, my best guess is that this leads to some sort of “competition” from her side, because she treats me as if I were inferior to her and everybody else, walking past me, not saying hi, over saturating me with the work she doesn’t feel like doing, telling me almost everything I do is wrong even though other supervisors have approved it.

This only became intolerable to me when everybody at my team gave me positive feedback, but she reported me to the CEO as lazy, ineffective, egocentric and rebellious.
This caught me by surprise because of a sudden shift in everyone’s attitude towards me, one week I was being praised for my work and actually got a job offer from a client visiting us, then next week people avoid me and the CEO won’t reply to my messages.
How am I supposed to deal with this? Is this normal? Am I supposed to not care about what this girl said about me even though it has changed every aspect of how I’m being treated here?