first of all Check weather your device is rooted !!! when SU and CLI execution permissions are not granted terminal application wont launch
and Chroot installer is designed to work with Net hunter terminal so other terminal emulation application wont work
if your device is rooted ans still you are not able to launch the terminal , easy guess is installation was abnormal or not proper
i recommend you to install BusyBox after rooting your device before installing nethunter

Happy ! Net Hunting !!!