I promise they just look ugly but they're simple to read as long as you keep in mind the few exceptions to the basic rule.
There's 11 of these beauties (I grouped them by which consonant comes first).
ㄳ ㅄ ㄵ ㄶ ㄺ ㄽ ㄻ ㄾ ㄼ ㄿ ㅀ
Now, you're probably wondering: "How do I read this mess?"
It's actually really easy:
As the Final Consonant
As a general rule you pronounce the first of the pair with the exception of:
ㄺ ㄻ ㄿ
With these cuties you pronounce the second of the pair as if the first was never there.
Within A Word
Actually I really shouldn't have to explain it but if you haven't already figured it out, (don't feel bad if you didn't) you let the sound of the second letter carry over to the next available syllable.
" 젊은 "
which is young in English (o joven en el español)
look at you being all nerdy and smart. Pat yourself on the back, you did wonderfully. :D