It's unfair that English should be the international lingua franca. But we can't change two facts of history: the British Empire, and America.
I agree English is not a particularly logical or phonetic language. However it has two things going for it -- it's easy to speak badly and it is easy to extend. Its grammar is simpler than most Germanic, Slavic, and Romance languages (that I'm aware of -- correct me if I'm wrong). And being a mongrel language, it's used to absorbing other languages.
Plus no need to come up with a grammatical gender for every neologism or loanword. Chai latte? Done. Twitter? Done. Whereas in German, is it "der Tic-tac" or "die Tic-tac"? Or default to "das Tic-tac" since we don't know the origin of the word? This matters because the endings in all four cases of German depend on the grammatical gender. For instance, in the dative case, if it's "die Tic-tac", then it's "mit der Tic-tac", otherwise it is "mit dem Tic-Tac". Or in accusative, if it's "der Tic-tac" then it's "fuer den Tic-Tac". And then you have to get everyone to agree (for instance, der Joghurt or das Joghurt? depends where you are.)
In practice it's not a big deal obviously (neologisms enter the German language all the time), but in English there's just less friction and fuss. English also doesn't have a central gatekeeping authority to maintain the "purity" of the language -- it's more decentralized and driven by popular consensus (more or less -- there are still rules).
Neither does German. If you refer to the "Rat für deutsche Rechtschreibung", this is as the name implies just a transnational organisation from the German speaking countries to keep the orthography (somewhat) consistent.
Which is something that English is dearly missing. A consistent orthography actually helps language learners a lot. This is one of the few points where English sucks as a lingua franca.
If you think about the "Duden" dictionary, this is also not true. The Duden has always been a descriptive dictionary, not a normative one.
There is no organization in German on the level of the Académie française.
There are some small private clubs fighting for the "purity" of the language (which of course is ridiculous for a language with so many imported Latin/Greek/French and now English words) but nothing with enough authority to dictate the evolution of the living language.
That said, Germans often speak English like it was German indeed.
Even the most fluent non-native German speakers I know still mix up genders and adjective endings every second sentence, at least in speaking.