What is the Japanese Playerbase thinking and complaining about?

[Elexia]

very limited and of bad quality
and lack of interest doesn't help

No. The English courses in Japan is perfectly fine, it's actually a requirement for the basic level to be learned for graduation in many areas (not sure about Major cities though) so it's not limited and bad quality. What you probably meant was the lack of need to continue english after your graduation unless you go into business, otherwise there's almost no reason to learn english in Japan since their national language isn't English but most younger generations can understand and hold a basic conversation in English, just lack of confidence.