Here are the Gallup Poll results, over the years: American Pride Slips to New Low

Some of this comes from the DailyDoomer news that primarily reports bad news, exaggerates scary stories, and cannot find anything good to say. On my Travel Blog I have documented 2 years of “I moved abroad” stories – most of which are identical: “America is terrible, so this privileged individual/couple/family moved to Country X where everything is wonderful”. No surprise that the negativity takes its toll on readers and viewers. The media can rarely find anything nice to say.
It’s doom and gloom 24×7 – most of which is nonsense, not true, or greatly exaggerated. The effect of that on mental health is obvious.