廢話。How many native speakers of various Chinese languages do you know how converse with you regularly in Esperanto? The phonological system of Esperanto is noticeably worse than that of English for native speakers of Chinese to acquire.
What does that even mean? Have you tried pronouncing any Khoisan languages (or other languages with clicks) for example? If your native language is English, you'll have a much harder time than a native Zulu speaker would have.
Whether a target language is easy to pronounce depends on your native language (and other languages you can pronounce accurately). If you're a native Chinese speaker (whichever variety, but particularly Mandarin), English isn't anything like as difficult as French to pronounce.
Question: Are you referring to the spelling<->phonetic consistency of the language or to the sounds the language use? I think you and tokenadult may be speaking about different things here.
I only have second-hand accounts from proselytes, and they say esperanto is nowhere as bad as English for Chinese, Japanese and Koreans. Just google around if you want to read from them. English is so difficult to pronounce correctly than my prior is to believe them.