I agree, though often negative expecations come from expetiences too. If you got bullied in high school, the idea that there are people who want to help you becomes alien.
Being terminally online is not always the root cause of a skewed view of reality. It's one step away from anxiety alone.
Hope it's improving for you! I went through that level of it too.
What sucks is the gaslighting every time I brought it up. My parents, teachers, and others would act like I started it. Pisses me off looking back to it today.