It’s honestly kinda debatable which decision was better. I mean yeah making peace between 2 communities is more difficult and the benefits are outstanding but the cost was the risk leaving each other exposed. I mean weren’t there numerous of people against Rick Grimes when they took down Negan? And because of Rick protecting Negan from execution his own team went behind his back to do it themselves, if the bridge hadn’t exploded I wonder if there would be a family together in the end…I think personally it was justified to kill Negan
Rick may have had his share of failures yes. But for every failure he rise again & continue to fight until he get it right. He refuse to quit no matter how dire things get