Maybe I'm wrong but the Internet, expanded government powers, cars, and frivolous litigation are definitely all things that occurred post-1914 aka after Woodrow Wilson's presidency roughly, when the executive branch began to expand massively and set a precedent for state and local governments to do the same.

Our ancestors from the 1800s weren't harassed like this unless they were Puritans maybe

well, sure, but the article is about a drop of life expectancy in 2015, not since the 19th century.