English really can be weird, but it still one of the easiest languages to learn (among widespread ones, of course). There is Esperanto with its straightforward rules, but it has a bit more than 100 000 speakers. On the opposite side is English with its vast popularity. You can hear it everywhere, passively studying it. So it's why English is so easy to learn. And I don't even mention various offline and online courses and resources, such as these quotation marks worksheets. Still, it has room for improvement (although they don't wanna change anything).