彼女は自分より英語が下手な人があまり好きじゃない。
① She doesn't like people who are not as good as she is at speaking English.
② She doesn't like people who don't speak English as well as she does.
She doesn't like people who... = 彼女は〜な人が好きじゃない。
be good at = 上手
be as good as ... at ... = 〜と同じぐらい〜が上手
be not as good as ... at ... ＝ 〜と同じぐらい〜が上手ではない（つまり、〜より下手）
speak English well ＝ 上手に英語が話せる
speak English as well as ... ＝ 〜と同じぐらい上手に英語が話せる
don't speak English as well as ... ＝ 〜と同じぐらい上手に英語が話せない（つまり、〜より下手）
アメリカ合衆国 
