Based on OP the number of English and Mandarin speakers is roughly the same, and considering written Chinese is mostly shared between languages that would mean that more people can currently read Chinese than English.
You have your qualms about Mandarin, but anyone can complain about a language they do not speak, and claim it is too difficult for this or that reason. Compared to English, Chinese grammar is very simple, the written language is compact, and there is little confusion about pronunciation. It seems as good as any (if not better than most) as an international language.
It seems you realize it as well, as it is hinted in your own posts; you will never convince everyone to pick your preferred language and convert to it. It is like trying to convert everyone to the same religion. You may think that your choice of [language/religion] is the best one, the one that makes the most sense, without realizing your own bias.
You have your qualms about Mandarin, but anyone can complain about a language they do not speak, and claim it is too difficult for this or that reason. Compared to English, Chinese grammar is very simple, the written language is compact, and there is little confusion about pronunciation. It seems as good as any (if not better than most) as an international language.
It seems you realize it as well, as it is hinted in your own posts; you will never convince everyone to pick your preferred language and convert to it. It is like trying to convert everyone to the same religion. You may think that your choice of [language/religion] is the best one, the one that makes the most sense, without realizing your own bias.