That was me too - the thing that confused me the most while learning was the whole "Park" is actually "Pak"
For having zero knowledge of the language, some of them were really close :)

I've seen people (and by people I mean kpop fans) around the internet giving these people a really hard time for "butchering" the names and I'm just like, I think they did a pretty decent job considering they're not used to korean pronunciation. hell, I know avid fans of kpop who are still having trouble with the names.