Don't put down the bike. I had a Giant TCX a few years ago. Great bike.
Try swapping the tires for something like 700x 28 road tires. Something like this if the trail is really as bad as you describe.
http://www.biketiresdirect.com/produ...700c-road-tire
Have fun.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.