lg stylo root problem

im new here so... im not sure if this is the right place to post. i have a lg stylo i have been trying to root for 3 days now and nothing. super user shows up and asks for a binary update but will not do it. root checker shows no root same with flashify. i have done factory resets and the one with the vol down key and power button. no luck super user shows up no matter what but no root no matter what method i try, the one listed here (one click?) and another like it where you add stuff manualy. i havent had any luck can someone help please. as a side note i dont know if its related to rooting my phone or a secondary issue but my rear facing camera refuse to work now. just shows black for a second then back to home screen. im on 5.1.1. thank you for reading