Miserable

Wherefore have we fasted, say they, and thou seest not? wherefore have we afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find pleasure, and exact all your labours. (Isaiah 58:3)

When I wept, and chastened my soul with fasting, that was to my reproach. (Psalm 69:10)

2 In those days I Daniel was mourning three full weeks. 3 I ate no pleasant bread, neither came flesh nor wine in my mouth, neither did I anoint myself at all, till three whole weeks were fulfilled. (Daniel 10:2-3)

For word came unto the king of Nineveh, and he arose from his throne, and he laid his robe from him, and covered him with sackcloth, and sat in ashes. (Jonah 3:6)

In the day that you fast you have a great time and go about your business. Compare that with I wept... with fasting... and I Daniel was mourning... and laid his robe from him... and sat in ashes. This makes it pretty clear what the problem was with their fasting at its root. They were doing the right thing but really it wasn't such a big deal to them. In the other cases of fasting here the suppliant was downright miserable. Generally speaking we should be joyful and positive, but there is a place for mourning. When there is something worth moaning about and the time and place are appropriate then moaning is the right thing to do. Paul writes If in this life only we have hope in Christ, we are of all men most miserable. (1 Corinthians 15:19) But he writes that the hope of the resurrection changed that. I conclude that we should expect that at some times our joy in life will come only from the hope of the resurrection. Some people would call that negative, I call it the truth.
Do you want revival? Do you want reformation? Do you want the gospel to reach the world?
Agonising for these things in your heart will bring them closer. Outward fasting can help you to agonise, but in itself it is no replacement for actual agonising.