At some point, some US employers would hire armed private security companies like Pinkerton to break strikes, often leading to multiple deaths.
In other countries, the army would be sent to break prolonged strikes by shooting at strikers.
In other words, it has been way worse.
This happened in West Virginia as well: https://en.m.wikipedia.org/wiki/Battle_of_Blair_Mountain
Those conflicts (and there was a more recent one, in UK, during the 1980s), are with folks that have difficult, low-skill, low-pay, blue-collar jobs that can be filled by many people.
I doubt that you could find similar stuff about high-skill, highly-paid employees, such as engineers. I think that, even in the days when cavalry was being used against striking miners, the white-collar workers were being treated fairly well.
Maybe it has been worse for them, but I’m not so sure.