There wasn't much meat with my Gyudon. It was disappointing so I asked for another serving of meat.
There wasn't much beef on top of the rice in my Gyudon. I wasn't satisfied so I asked for more beef.
ーThere wasn't much meat with my Gyudon. It was disappointing so I asked for another serving of meat.
「牛丼にあんまり肉が乗っていなかった。悔しかったから肉だけお代わりした。」
meat「肉」
another serving「お代わり」
It was disappointing で「悔しかった」と表現できます。
ーThere wasn't much beef on top of the rice in my Gyudon. I wasn't satisfied so I asked for more beef.
「牛丼のご飯の上にあんまり牛肉が乗ってなかった。納得がいかなかったから、牛肉のお代わりを頼んだ。」
I wasn't satisfied で「満足しなかった」だけでなく「納得がいかなかった」というニュアンスでも言えます。
ご参考まで！
カナダ 
