YOU SAID:

My mom is one of the worst people I've ever met, she can't help but be super childish and is less mature than my 6 year old brother.

INTO JAPANESE

私の母は私が出会った中で最悪の人の一人です。彼女はとても幼稚であり、6歳の兄よりも成熟していません。

BACK INTO ENGLISH

My mother is one of the worst people I have met. She is very childish and less mature than her 6-year-old brother.

INTO JAPANESE

母は私が出会った中で最悪の人の一人です。彼女は非常に幼稚で、6歳の弟よりも成熟していません。

BACK INTO ENGLISH

My mother is one of the worst people I have met. She is very childish and less mature than her 6-year-old brother.