The King of Individual Soldiers of the System

The protagonist was framed and imprisoned and became a mentally ill person, but before he was released from prison, he got a system mall. In order to avenge his parents, he did not hesitate to make the entire country an enemy. Who would have expected that all this was a conspiracy by his parents and enemies. What should the protagonist do when he learns all this? There are kings of soldiers, soldiers, ancient martial arts, supernatural powers, practitioners and even high-tech weapons and equipment here. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.