Suggest: "The king and the queen are considered evil."
Yes, or more generally spoken: Kings and queens are considered evil.
I think that’d be “Raja itu dan ratu inu dianggap jahat.”
You don't necessarily need the itu. But without "the", the English sentence sounds unnatural, or depending on the context, a bit pompous.
Or perhaps there are Englishes which don't double down on the the.
The English is ungrammatical
No, there is correct grammar. A double "the" is not there, but what about that makes it totally ungrammatical?
You just got here six hours ago, but when we left those comments months ago, the sentence didn't have any "the"s.