I had no issue to take with the other part of your statement. It was absolutely poor parenting.
The police responded to a 911 call about "a male black sitting on a swing and pointing a gun at people" in a city park. The dispatcher, who was suspended for eight days, failed to relay all of the relevant information- such as the fact that the caller said the individual was a juvenile and the gun was "probably fake." With only the information they had, the officers came with guns ready. Not because they were bad cops, but because you don't use a taser on a gunman.
When they got there, they saw a gunman who was 5'7 and 195lbs. In another article, it said that "The police department has said that Rice was reaching for what appeared to be a weapon tucked in his waistband as the car approached."
The lawsuit, being a lawsuit, is full of accusations and claims that will need to be proven in court. With the information they had, I don't think they were acting "unreasonably, negligently, recklessly, wantonly, willfully, knowingly, intentionally, and with deliberate indifference to the safety and rights of Tamir Rice."
The officer who fired the fatal shot was Loehman, who was released from his previous employment for being '“distracted and weepy” during a firearms qualification course the previous day. “He could not follow simple directions, could not communicate clear thoughts nor recollections, and his handgun performance was dismal,” (Police Deputy Chief) Polak wrote in the letter to the city’s human resources director.'
He wasn't fired for shooting a kid or a little old lady. He wasn't fired for discharging his weapon at a baseball field when he got really excited. He was fired because he was clearly upset about something (he said it was his girlfriend breaking up with him) and he failed to hit his target for qualification. Obviously he must have got a handle on it eventually, because there isn't a law enforcement job out there where you carry a gun but you don't have to qualify with it. I think most people would have told him to take some time off to get over the girlfriend.