My listening skill is such that I need to hear something around three times to finally understand what they are saying.
ご質問ありがとうございます。
"My listening skill is such that"=「私のリスニング能力は~ほどです」
"I need to hear something around three times"=「何か(言われたことを)3回ほど聞く必要があります」
"to finally understand what they are saying."=「相手が何を言っているのかやっと理解するのに。」
ご参考に。