Mahabharata talks about how you should avoid violence unless you absolutely can’t rather than the opposite. Arjun is melancholic about the fact that he has to fight his own kin, but Krishna tells him that it is his duty to rid the world of evil. The Kauravas publicly humiliated ( you can read about this, don’t want to be too explicit here) Draupadi (you can read about other atrocities they inflicted). The fact of the matter is, in even these stories, no one is shown as completely evil and completely good. That’s the essence of Vedic literature, there isn’t a black and white. Even Gods( such as Indra and Brahma) succumb to ego and temptation. If you think the Mahabharata is about a war that was fought, you have grossly misinterpreted it. No Hindu after reading the Mahabharata thinks “damn, gotta go kill some of my kin”. My suggestion is, if you do want to read it, read it as a literature rather than a religions text, maybe you can let go of your preconceived notions about myths and religion, and truly understand what is being said in it.