You are completely wrong on your first sentence. Hangul has fewer letters in the alphabet, fewer consonants, and virtually no different forms. It's also a phonetic language written as it's spoken more or less, unlike Arabic which leaves out vowels usually making it ambiguous far to often. Lets also not forget that there's many dialects of Arabic depending on region. Further, Arabic is often written in a script that makes it harder to read, especially from a distance, whereas Hangul is pretty unambiguous even with very small print.

(Reply biased a little based on my own experience reading both languages, but still should be pretty factually correct for most)