I remember when I first consciously decided to stop reading mainstream news. I was in high school then; I had my Firefox configured to put RSS feed from national newspapers as a drawer of bookmarks under the address bar (oh, the days you could do that in a browser...). Took me a while to realize the reason why I feel so sick in my stomach on mornings and evenings was that just looking at the headlines disturbed and depressed me. I unsubscribed from the feeds, killed the bookmark drawers, and after a short period of FOMO, I started to feel better.

The "Newspapers with a certain quality, a long-term perspective and in printed form" are few and far between. If you can find those, by all means, stick to them.