I feel a lot of sympathy for the officers referenced in the article and their personal stories seem very genuine and troubling.
I have no idea how to "solve" the more general problem that seems to be the thesis of the article. Anyone can see that the political valence of modern police forces in the US as expressed by their unions is now so hostile to a majority of the people being policed it seems entirely untenable. And in places like New York City that is despite the force getting better at reducing violent incidents with residents over the last decade or so. The very extreme bunker mentality expressed by police unions likewise make them bad-faith actors in any attempts to improve the relationships involved here.
The Newark success story seems like the solution: https://www.nj.com/news/2021/01/newark-cops-with-reform-didn...
Of course that sure makes it seem like my original position that "larger forces" would probably be better look quite incorrect, it would be hard to imagine implementing a reform like Newark's if a regional police force were in need of reform with multiple stakeholders across jurisdictions to convince and satisfy. I do think that I would really love some journalism that goes deep into what other forces think of the Newark reforms and the results at a union & officer level.
Back to the original article, some of the numbers here are bit misleading, I found this article:
https://www.cnn.com/2020/12/18/us/police-reform-year-of-reck...
"The retirement bubble is bursting
There's another, older, reason behind so many officers leaving the force: the 1994 Crime Control Act, a controversial law overseen by Joe Biden in the Senate and signed by Bill Clinton, which provided $7.6 billion in federal funding for tens of thousands of police officers.
"All these cops are coming up for retirement now," said Ivonne Roman, one of those so-called "Clinton Cops" who retired as police chief of Newark on April 1. "This past April alone 200 cops retired in Newark. This was always coming regardless of Covid or the protests.""
Nearly 10% of the officers in the US are apparently eligible for retirement in the US as of the end of 2020, and with the risks of COVID-19 I can see why you would see a large uptick in resignations regardless of any other circumstances. Not that this takes away from the very real experiences that other officers are finding pushing them out of the policing earlier than they would otherwise like.