Yes, I am aware. It's crashing because you do not have OptiFine in your mods folder (it is searching for it, but can't find it). Please follow the guide I sent to uninstall OptiFine.
Unfortunately, we do not control what appears on the adfly pages. Never click on anything except for "Skip Ad". These pages cannot harm your PC unless you download and run something, so you can simply close the browser and you do not have to worry.
From the log, it looks like a particle crash from "falling leaves" by cheaterpaul.
Additionally randompatches and BYG are mod conflicts, and Aristois will crash with them installed.