English speakers know that their language is odd. So do people saddled with learning it non-natively. The oddity that we all perceive most readily is its spelling, which is indeed a nightmare. In countries where English isn’t spoken, there is no such thing as a ‘spelling bee’ competition. For a normal language, spelling at least pretends a basic correspondence to the way people pronounce the words. But English is not normal.
Spelling is a matter of writing, of course, whereas language is fundamentally about speaking. Speaking came long before writing, we speak much more, and all but a couple of hundred of the world’s thousands of languages are rarely or never written. Yet even in its spoken form, English is weird. It’s weird in ways that are easy to miss, especially since Anglophones in the United States and Britain are not exactly rabid to learn other languages. But our monolingual tendency leaves us like the proverbial fish not knowing that it is wet. Our language feels ‘normal’ only until you get a sense of what normal really is.