RUDE

rude → malelve, frekan, radi, enpètinan

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How shameless, how rude! (help in translating that) is it "kijan wont!"?

Generally, you would say:

How shameless and/or rude!
Ala moun sanwont!
What shameless people!

Ala moun san prestij!
What reckless and foolish people!

Ala moun san zedikasyon!
What uneducated people!

Ala moun malelve!
Ala moun malonèt!
How rude!

If you're specifically talking about a man, you would say:
Ala nèg sanwont!
Ala nèg san zedikasyon!
etc...

Or if you're specifically talking about a woman!
Ala fanm sanwont!
Ala fanm malelve!
etc...

You could replace moun, nèg, or fanm with a pronoun. 
Example:
Ala w sanwont!  (You have no shame!)
Ala li malelve! (He's so rude!)
Ala yo san zedikasyon! (How uneducated they are!)