Oh yeah we're gung-ho about our unions here in Sweden. Go IF Metall, fuck their shit up!
Edit: holy shit, it's for not having a kollektivavtal? Why is anyone even working there? Tesla isn't some mum and dad store, it's owned by the richest cunt in the world. There are specific instances where you can forego having a kollektivavtal, but Tesla definitely isn't one of those companies.
Edit2: So a kollektivavtal, a collective agreement, is generally a collection of agreements that worker unions, employers, and employer unions (like Svenskt Näringsliv) have agreed upon, which covers working conditions for your particular line of work. Things like salary negotiations, savings for retirement, remuneration for travel/extra work/graveyard shifts/on-call duty. Insurances in case you get hurt or sick because of your job. Personal/career development. Extra compensation during parental leave. Wellness allowances. The list goes on.
It's a lot, and it looks different depending on what you work with, and where you work. It ensures that the employee has certain guaranteed rights that should the employer withhold, you have legal recourse (usually the union will assist with this) should you need it. Naturally there's also laws backing workers up, so should there not be a kollektivavtal at your workplace, your employer still can't just break the law.
There's no law codified stating that an employer has to ever raise the employee's salary though, for example, so if you work at a place that doesn't have a kollektivavtal, expect to never see a pay bump.
There are of course situations where a kollektivavtal doesn't make any sense. For example, should you start a company and employ yourself a kollektivavtal is a bit overkill.
My first job lacked a kollektivavtal. It was a nice first step into my career, but it had a decent amount of turnover. Generally unless you have a very specific reason to not have one, not having a kollektivavtal is seen kind of as a red flag. Either you're the world's most trustworthy employer (yeah right) or you're up to some real fucking shady shit.