Bootloop and Hard Reset doesn't help. LG-Flex 2 H955 5.1.1

Hi, I tried to root my phone with this guide androidxda.net/how-to-root-att-lg-g-flex-2-on-android-5-1-1-lollipop-with-one-click-root-method/
Anyway, when the phone rebooted it got stuck at the LG Logo and a Hard Reset doesn't do squat.
It just keeps bootlooping....

Any ideas?

Any help would be appreciated.