People are being threatened and/or fired for organizing workers at their workplace. I don't know what your definition of union busting is, but it happens over and over in Sweden.

Example:

https://www.arbetaren.se/2024/10/14/varslades-fran-zalandoshylager-nar-arbetsshykoparen-fick-veta-hans-roll-i-facket/

Another example, from Finland:

https://yle.fi/a/7-10077702

Strikebreaking is still a thing, and while very much illegal in its traditional form employers have figured out new ways to legally do it by importing labour from other countries:

https://www.transportarbetaren.se/strejkbryteriet-ar-tillbaka/

And regarding the general exploitation of workers, especially low-paying precarious jobs that require hard labour:

https://www.dagensmedicin.se/arbetsliv/arbetsmiljo/fack-stammer-apotea-for-manga-overtidstimmar/

I don't know which country you are from, but it doesn't really matter is I am quite sure these things happen there as well.

Capitalism is an antithesis to ethics; you can't have a capitalist economy without exploiting your workers, and while you can have more or less "nice" employers the absolute majority of them will find ways to fuck you over when push comes to shove.

Companies exist to make as much profit as possible, and they lose their power if their workers start organizing. That's why they will find every way to (legally or not) stop that from happening (as seen in the examples I have linked to above).