Dumb is too vague a word. On the whole, English trades elegance for adaptability. You can compose elegantly in it, but as you note, it has many irregularities.

Dumb is too vague a word. On the whole, English trades elegance for adaptability. You can compose elegantly in it, but as you note, it has many irregularities. So elegant phrases take effort and practice, where some other languages carry that elegance naturally in everyday speech. (Admittedly: as a writer, poet, singer, or orator, the challenge of making English truly pretty provides job security) But the widespread irregularities of English are part of what gives it a knack for incorporating foreign words, phrases, and idioms. All kinds of weird alien things can be made to fit. Bizarre neologisms and imports can be deciphered relatively easily. Secondary to the accidents of history, this adaptability seems to be a part of why its been "chosen" as one of the main global commerce languages. When Hindi, Arabic, etc need to pick up chonky Germanic words or convey the tonal detail of Mandarin, it disturbs their elegance. But when English has to do it, it just adds the hodgepodge stew that we're used to.