I've never used Facebook that much even though I do go on Reddit anonymously from time to time. For the most part, I just try to avoid making mistakes I've done in the past while not getting too caught up in sub-reddit drama. I'd say the main benefit of anonymity is definitely being able to express your feelings freely without many consequences which is healthy. The main downside of anonymity is not being able to make a reputation many modern consumer societies usually value.

Yes. It would be nice if education was about becoming a better person and learning for the sake of it rather than just getting a job.

I usually just do hobbies while staying offline as much as possible whenever heavy feelings come.