Learn Farsi: این جور کارها را دوست ندارم.

In Farsi, demonstrative adjectives like این (this) and آن (that) do not take a plural marker when they come directly before a noun, even if the noun itself is plural. Since it describes کارها (plural), it translates to 'these' in English, but the Farsi word remains singular این.

I thought کار meant 'work' or 'job'. Why is it translated as 'things' here?

While کار often means 'work' or 'job', it is also widely used to mean 'action', 'deed', or simply a 'thing to do'. In the phrase این جور کارها, it refers broadly to 'these kinds of activities' or 'these types of things'.

Why do we need the object marker را in this sentence?

The word را marks a definite (specific) direct object. Because you are using the demonstrative phrase این جور (this kind), you aren't just talking about doing things in general; you are pointing out a specific category of things. Therefore, این جور کارها is specific and requires را before the verb.

How would an Iranian actually say this sentence in casual, everyday conversation?

In spoken Farsi, the plural suffix ها often drops the 'h' sound to become just ا, and the object marker را usually becomes رو. A native speaker would likely pronounce this entire phrase as این جور کارا رو دوست ندارم.