Is it really English an easy language?

There are many people who consider English to be a non difficult language, and I agree with that because when someone starts studying English he or she is able to start speaking quickly; and that is possible because of the lack of difficult or complex grammar rules in English. So that, if what you want is not having a perfect command of English it will be always for you an easy language to learn. But, if on the contrary, what you want is reach high levels of this language English becomes a more difficult and complex one, since there are many special cases and exceptions and not simple rules.