If you think this is delicious, you must usually eat really bad food!
「いつもどんだけ不味いもん食べてるのって感じ」= You must be used to eating some really bad food! / If you think this is delicious, you must usually eat really bad food!
ボキャブラリー
used to eating = 食べなれている
really bad food = とても不味い食べ物
think = ~だと思っている
delicious = とても美味しい
usually = いつも、普段
must = ~だろう、~にちがいない
You make it sound like you normally eat terrible food.
You sound like you've never had something so good.
この場合、次のような言い方ができますよ。
ーYou make it sound like you normally eat terrible food.
「普段ひどいもの食べているように聞こえるよ」
ーYou sound like you've never had something so good.
「おいしいもの食べたことがないみたいだね」
ご参考まで!