The scene where the protagonist is climbing up and down the stairs to build strength was pretty boring, but in a way, that made it feel like a slice of everyday life, which I actually liked.
こんにちは！
ご質問ありがとうございます。
ご質問について、いくつか言い方が考えられますが、例えば、
The scene where the protagonist is climbing up and down the stairs to build strength was pretty boring, but in a way, that made it feel like a slice of everyday life, which I actually liked.
とすると、「主人公が、階段を上り下りして体力を鍛えるシーンは[殺風景](https://eikaiwa.dmm.com/uknow/questions/120767/)だったが、逆にそれが日常生活のワンシーンに見えてよかった」となります。
役に立ちそうな単語とフレーズ
flight of stairs 途中に踊り場がない一続きの階段
参考になれば幸いです。
It gave me a glimpse into his everyday life, which was kind of good.
この場合、次のような言い方ができますよ。
ーThe scene with the main character going up and down the stairs was pretty boring, but it gave me a glimpse into his everyday life, which was kind of good.
「主人公が階段を上がり下りするシーンは結構つまらなかったが、彼の日常生活を垣間見ることができたのはよかった」
to give a glimpse into ... で「…を垣間見る」
ご参考まで！
日本 
カナダ 
