Most of English's inconsistent spelling came about from (sometimes incomplete) pronunciation shifts. Now knight and night are homophones where they once weren't, and while sky still rhymes with by, it no longer rhymes with archery. Fixing this is difficult, not just because people are resistant to change, but also because the variations in accents.

However, we're also introducing a lot of new inconsistencies due to a relatively recent shift to adopting foreign words without changing the spelling or pronunciation as we would have in the past - something no other language does. This forces English readers to learn multiple foreign orthographies and English's to read English.

The British are sometimes better about it. They see the word "jalapeno" or "tortilla" and pronounce it like you'd expect (and get mocked for it) with English's orthography, as opposed to forcing everyone to use Spanish orthography to pronounce them halapenyo and tortiya.