Can only boot into recovery?

So I decided to root, and got through unlocking the boot loader and getting TWRP installed, but once I installed SU, I get stuck at the big M screen before the animation stiches. I can power off and boot into recovery mode, and have tried wiping all that I could and reloading SU, but I still can't get past the Motorola logo.

Any help would be greatly appreciated!

FYI, the version of SU I installed is "UPDATE-SuperSU-v2.76-20160630161323.zip"