As someone who has learned four different languages and studied a dozen more, English is on the harder end of the spectrum to grasp phonetically. The nice thing about English (and other Romance languages) is the alphabet. Compare that to Chinese, with a laundry list of characters to absorb or Arabic which omits a bunch of vowel sounds, and you experience a lot of trouble.

But compare English to Spanish or German and you'll find it to be unusually confusing and difficult. Pronunciations, secondary meanings to certain terms, and the haphazard grammar all make English a game of learned reflexes rather than logical progressions.

That's not special to English, but it is more pronounced in what is effectively a mongrel outcropping of assorted Western European dialects.