> Italian is also very easy to learn

If your native language is similar, for example, Romanian or Spanish, sure it is. For the others, not really.

> while German makes absolutely no sense.

Mark Twain also complained about it.

> A turnip is female, the fishmongers wife is neutral, a boy is male, a girl is neutral, the wife is female. Plural of Tür is Türen plural of Öffnung is Öffnungen, plural of Vogel is Vögel plural of Fenster is.. Fenster.

So as in basically every language that has a grammatical gender. If it's not the same as in your native language, it won't make sense, and you'll need to learn it. After some time, you'll notice the pattern and will be able to guess accurately.

> Hundreds of unspoken rules regarding word order, some verbs that can be separated and others cannot.. Completely random.

The rules are well understood and clearly written. You just need to learn them.

> And good luck even being able to hear the difference between spucken and spuken if your language doesn't have long vs. short vowels.

Isn't that the case about every foreign language? I was never able to distinguish or pronounce correctly French diphthongs. I'm pretty sure half of the people here wouldn't be able to pronounce a couple of sounds from my native language even if their lives depended on it.