Career
American "Discover" magazine revealed: Einstein made 23 scientific mistakes in his life, such as: He believed that black holes are impossible to exist; he believed that the universe is static and unchanging ; and Einstein once said, "God does not play dice" and so on.
Marriage
The first wife Mileva had to go to Locarno because her son had influenza, whooping cough and otitis media at the same time. After Mileva left, Einstein married his lover Eliza. But after a while, their marriage could not survive. Both of Einstein's marriages failed.
In the end, he regretted inventing the atomic bomb and wondered whether it was considered a failure. I hope it's useful to you, and I hope you'll adopt it.