I feel like Vidhi was spot on with her analysis, Donal wants to be seen more but has no idea how to go about it and unfortunately, in her bid to be seen more, she ends up picking fights on trivial topics that inturn show her in a negative light.
She just needs to take a few steps back, do some self introspection and pick only those battles that are worth fighting. I believe she's also insecure with her friendships inside the house because she hasn't made a bond like the ones Tejasswi and Vidhi share with Jay, Karan and Vishal and to her they look like a unit and she feels left out even when they were all hanging out together in the start.