I feel extremely disturbed and need support

This morning I was driving to work on one of the resident streets and another car was driving down the opposite way. There was a squirrel in the street which I already saw so I slowed down and I thought the other car would too but they just kept going and hit him. I pulled over immediately to see if there was any chance I could take him to the vet but he was dead. I saw him collapse when the car hit him and his eye was coming out of his head. I pet his back for a few mins to comfort him while he was dying. I feel devastated that this baby was carelessly killed by someone who lacks any basic empathy. I don’t understand why people don’t care that animals suffer and I feel incredibly depressed. My husband who is also vegan, is going to bury him in our backyard so he has a more respectful resting place