The chart above is from a recent Gallup Poll -- done between June 1st and 13th of a national sample of 1,520 adults, with a 3 point margin of error.
In the mid-seventies, about 68% of the American public said they had a great deal or quite a lot of confidence in the church or organized religion. That's a very respectable number. But that is no longer true. In 2018, only 38% say that -- a huge drop of 30 points.
I believe this is because the evangelicals are giving religion a bad reputation. Their attempts over the last few decades to throw the country back to the 1950's (when women, minorities, immigrants, and the LGBT community had few rights) have turned off many people. And it has caused a bigger percentage of each generation to leave religion because they simply cannot go along with those hate-filled policies.
Now it looks like the evangelicals' favorite president, Donald Trump, will get to pick another Supreme Court justice. He has promised those evangelicals that he would pick a justice that would overturn Roe vs. Wade (even though about 67% of Americans oppose that). If he does, it's going to damage the reputation of organized religion even further.