It means “the action or fact of treating someone unfairly in order to benefit from their work”. If you’re having someone reject their rights in a contract because that benefits you, that’s a form of exploitation. You’re making someone worse explicitly so you benefit.
> It often just means "I don't like what I signed up for freely".
From my first post:
> If you can sign them away, you can be swindled of them.
If you’re swindled, you’re not given them away freely.
How do you define "swindle"?
Clearly the EU has figured some of this out and might even have some of the specificity you are looking for.
If you don’t then my apologies, we can break them down for you and link dictionary definitions (or Wikipedia if that’s your preference).
It is not hard to understand, and I suspect you are not trying to understand it.