Fucking hiragana. No sane language requires multiple pen lifts to write a single character. One is pushing it. And then you have this monstrosity, ゑ, which is done without a pen lift, but is utterly insane. Thankfully, that's practically obsolete. Here, let me make that bigger for you so you can see it more clearly:
Katakana is a lot more reasonable from a writing standpoint, though having two alphabets that are exactly equal to each other is also nuts.
I will say this, having their alphabet consist entirely of vowels, and consonant-vowel pairs (plus ん [equal to n]) adds some much needed simplicity.
Hell, the more I learn about language, the dumber my own looks too. We should have never gotten rid of the letter Þ in favor or th. Compound consonants are retarded.