This will at the least reduce stability in the country, which to the average person is one of the most important things. Déby was a ruthless dictator fighting

This will at the least reduce stability in the country, which to the average person is one of the most important things. Déby was a ruthless dictator fighting against ruthless Libyan-backed Islamists (and to a lesser extent Boko Haram). Both are horrible. Déby murdered political opponents and oppressed his people. The rebels used child soldiers, executed PoWs, and just want to set up their own dictatorship but Muslim. Currently, power has passed to his son, who is a general-major, so not much has changed, except he presumably has less power. This probably means more military influence in the country and less success against the rebels. Best case, his son turns out to be a better dictator than his father or least have to concede to the people more. Worst case, the discontent and political infighting leads to more instability and hardship for the country and the weakness leads to the rebels taking over.