That's so unfortunate.
It was such a rare chance, so it's too bad that I missed it.
"Is it true that I have to eat spiders on this TV program?" "Unfortunately, it is."
The remainder of your thoughts are very small. You've thought of everything you possibly can to solve this problem. In the end, the remainder of your thoughts is left with one phrase: "too bad." There's nothing else to think but the remainder.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.