I don't know about abusive, but she definitely left some rude voicemails and texts while Josy's phone was confiscated. She also was rude at first in the pre-throuple reveal in the dorm room. I found it very realistic in that way, and very touching when they worked it out, however briefly.
Let's start with the mandatory preface, I believe Maya is a nicely written character, and despite all my ramblings some months ago I don't care too much about her head (thou I still think it's big

), she's good looking too.
That said, I personally don't like her, she's not mean or willingly abusive, but she is a selfish/self centered woman.
- She has absolutely zero issues messing with Tremolo when she thinks it could get her into the HOTs, regardless of how he has interacted with her up until that moment.
- She has a complicated background, but what makes her sad is not for example the situation her mother is in, rather the fact her father doesn't like her being lesbian/Bi.
- We are shown how deeply caring for her Derek is, both early on in a more jovial way, and at the end of the last chapter, in a more profound way, Maya on the other hand doesn't show a similar attitude towards him.
I mentioned it during one of my previous tirades, but another small example is how she interacts with Tremolo during the camping event, Tremolo is drunk:
Tremolo: "You shouldn't, you have a great body"
Maya: "Tremolo what are you doing?"
Tremolo: "I don't know. I'm drunk."
Maya: "Tomorrow is the big day"
And from there the conversation starts revolving around the 'heist"
This is the way she approaches everyone, including Josy, it's her before anyone else, becasue of her difficult situation, except that her difficult situation... is not that difficult (not saying is easy) or unique to humanity.
Nothing wrong in liking her, again she's nicely written, and some folks like to hang around this kind of woman.