Blu8
Android Expert
It's fine. It's going to be hard to get rid of kinguser and all that depending what version you have, I would honestly not risk it though. If I were you I would flash back to pure stock, use odin to flash twrp (turn auto reboot off and boot into recovery manually to be 100℅ it sticks, then flash the SuperSU update zip in twrp.
https://download.chainfire.eu/696/supersu/
https://download.chainfire.eu/696/supersu/