YOU SAID:
“You don’t have to tell me how good my coffee is, OK? I’m the one who buys it; I know how good it is.”
INTO JAPANESE
「私のコーヒーがどれだけおいしいかを言う必要はありませんよね?私はそれを買う人です。その良さを知っている。」
BACK INTO ENGLISH
"I don't have to tell you how good my coffee is, right? I'm the one who buys it. I know how good it is."
INTO JAPANESE
「私のコーヒーがどれだけおいしいかを言う必要はありませんよね? 私はそれを買う人です. 私はそれがどれほど良いかを知っています.」
BACK INTO ENGLISH
"I don't have to tell you how good my coffee is, right? I'm the one who buys it. I know how good it is."
Come on, you can do better than that.