In my experience, I feel like Mastodon is a way healthier social media platform than most. No (intrusive) trends, no "likes of friends", no randomized timeline, but just other people posting pictures of their oscilloscopes, cats, plants and hobbies, or starting healthy discussions about things.
It's not a panacea by any means, but makes an almost mind-blowing difference from the "usual" addictive social platforms (FB, Twitter, YouTube, etc.).
It feels a bit like joining a café where everyone is human, and imperfect, rather than a shiny videolottery casino where the higher liked profiles keep winning.