No, i've been experiencing this "doomscrolling" lately, doesn't know there is a term about this. I can tell it's not healthy, it's like your phone or laptop has magnet to your eyes, and you just like scrolling, and facing to your screens especially in phone? even though you fell like being like dizzy, and it turns out you're already been hours doing like that in any part of the house. And it cause of your non-productivity the whole day. Although i tend to stop it since i feel like sleeping 2-3 hours in the afternoon just to stop that. My remedy is going outside, park, seaside, anywhere where there's fresh air. But only on weekends. Or after i take my child at school.

But for gambling? I faced nothing yet, never been an addict on gambling, only those i've mentioned above.

To your question, of course, no, too much is not healthy in everything.