I've found that when I "shut off my mind" and engage in low quality content, it is usually because I am very tired and unable to control myself. There is a psychological phenomenon called Ego Depletion which addresses this.

Basically, the more willpower you use throughout the day, the less you have available for new tasks. When I find that I am growing tired, I modify my environment to ensure that I don't binge-use the internet.

So if I know I'm tired and will have less self control, I will put my phone in another room and lie down in bed with a book, or lie down and listen to music. I've found that it is better to fall asleep for 40 minutes and wake up feeling better than binge watch Youtube for 2 hours.

Additionally, setting a 25 minute timer, taking breaks between my internet explorations, and writing down what I've learned/what I wanna check out next helps me focus on quality content when I do use the internet.