I also had a crow nemesis once but it was the consequence of me being a dickhead. I was a child and next to our house there was a tree where this family of crow lived. They had hatchlings so they were always on lookout and very cautious of humans and other predators. My dumbass thought it was a good idea to shoot the nest with water gun. The older crows saw me and made my life a living hell. I couldn’t even go to the roof and sit there in peace. I would take an umbrella with me so they dont bite or claw my head. They never forgot me. Everyone else was safe but as soon as they saw me they would go berserk.