V for Vendetta

[Andromeda18_]

I know some English people that suck at speaking Spanish LOL. I think its a matter of what age you get exposed to the language.

That's certainly true. Research has shown that children up to the age of 11 learn languages much better. So much so they don't even need to formaly study a language if they begin learning it early enough.
You're also right about English speakers sucking at speaking Spanish. It's not that hard to understand why, really. English is a Germanic language while Spanish is a Romance language, they belong to different language families. It's only normal that one who speaks a language from one family has a hard time learning a language from another family. This is even more evident when an English speaker tries to speak Portuguese. Seriously, it's actually amusing! Phonetically, Portuguese is an extremely rich language. It has a more complex vowel structure than Spanish. Just like French, Portuguese has a set of nasal vowels, and also features several nasal dipthongs and drawling of unstressed vowels. Ask an English speaker to say something like 'pão' (bread) or 'confusão' (confusion) and there's no way in hell he'll be able to do it properly. There are Englishman who've been living here for decades and still can't get it right.
Portuguese grammar follows fairly similar patterns to those of Spanish, although it retains Latin grammar forms that are already lost in Spanish, but pronunciation makes it very distinctive. I believe that's why it is said that a Portuguese speaker can understand spoken Spanish better than the other way around. I've experienced it first hand.

I don't quite agree with you when you say English is the hardest language to learn. Again, learning a language from a different family than our own language is harder than learning a language from the same family, but as far as grammar goes English is a very logical language (the same can be said of Spanish and Portuguese), plus when it comes to phonetics English isn't particularly complex. This is one of the many reasons why English is considered the international language and is so widely spoken by non-natives.

There's no such thing as the 'hardest language', since it's all very relative, but perhaps Mandarin is the hardest to learn of them all.
The world's greatest polyglot, Ziad Fazah said "Mandarin was the hardest language to learn because of the vast number of idiograms.". Perhaps this is the reason why people think Japanese is hard to learn, but apart from all the characters one has to memorize, it is in many ways a very simple language. It lacks things that make European languages difficult like articles, gender, etc, and it also has very simple rules of conjugation. If Japanese could get rid of kanji, it would likely be a very simple language all-round.

My girlfriend is going to Japan for three weeks and we are both trying to learn Japanese.

You're not going with her?