long s and thorn would like to have a word with you, but they can't because they were removed from the keyboard

In Unicode, that's ſ and þ. Both historical English letters that are no longer used.

The pronunciation is so bad though. The consonants are mostly fine, but the way we write vowels is a total mess. We'd need at least a dozen vowel letters to sanely represent English. And we could cut a couple consonant letters to help make room, for maybe 30 letters total, still no accents.

It’s great compression: Y sometimes a vowel, sometimes a consonant.

And while not encoded on a keyboard, it still blows my mind that English has a crazy number of past tenses - and a such a bad hack of a future tense that it’s hard to classify as such.

Linguistics is fun. The accents are alright.

>only 26 letters with no accents on a keyboard

This was caused by the printing press and the typewriter (keyboard) both of which forced simplifications in the written English language.