Struggling to find peace and make dua for an uncle who caused family strife

Here's the situation: my oldest maternal uncle passed away last December. We had a decent relationship, but his actions deeply hurt our family. My grandparents were well-respected in our community back home, and he tarnished their good name with his behavior over property and his arrogance-once even looking down on my parents for being less wealthy. He drove wedges between his siblings and passed on his bitterness to his three daughters. Now, after his passing, they're taking it out on the rest of us, even making threats that affect marriages and young children in the family, which feels completely out of line. My struggle is this: I know he's the root of all this pain and held grudges when he died. When it comes time for dua, I can't sincerely pray for his soul-it would feel dishonest to Allah. There's guilt over holding onto this anger, especially since forgiving him is hard after all the damage, including threats to my wife's well-being. My mother gets it and shares the heartache, but it's heavy on my heart. Part of me is conflicted, remembering that no matter my feelings, he'll answer to Allah for his deeds. Just trying to navigate these emotions and find some solace, insha'Allah.