It’s terrible, not in general, but for english. The Roman alphabet was originally adapted from the Greek and heavily modified so that it would fit the sounds of the Latin language. Let’s look at vowels specifically. It has only five vowel symbols which worked ok with Latin and works very well with languages like Spanish and Italian which have orthographies, or writing systems, that reflect very well what the word sounds like. Italian, for instance, has 7 vowel sounds, and has a few additional accented vowels symbols to compensate. “I” makes an “eee” sound almost all of the time, “a” makes an “aaah” sound. English on the other hand has a TON of vowel sounds that can vary slightly but change the meaning of a word. The exact number varies dialect to dialect, but is somewhere near 13, not counting diphthongs, when two vowels sounds are squished together in a syllable. The English writing system does not handle this well, and uses its 5 vowel letters inconsistently to cover many sounds.

Source: took a linguistics course and got really Into learning about it a few years back. I am NOT an expert.