As the resident Divorce lawyer in the group let me pass a few comments.
Here in the USA, in addition to a get, most also go through a civil divorce. A case look up on the Judicial website will have names, dates, etc. Most other details are not available to the public.
Contrary to the public, most goyim don’t send singledom announcements (the bulk of my clientele is goyim). Even with a divorce rate of about 50% there is still shame and social stigma in a failed marriage.
As to hidden defects, an anecdote. 49 years ago, a female first cousin got married. In the Yichud room the boy took out a needle and shot up. The boy’s family had hid his heroin addiction. He lied and said it was insulin and his blood sugar was low from fasting. She knew better, you use insulin to bring down your blood sugar, not raise it. The officiant, ripped up the civil marriage license and never recorded it, she went home with her parents and a get was given promptly.
But it became knowledge that she had a bad experience and it took 10 years til she married again and has been married for 39 years. As for the boy, he left town and we never heard about him again.