Screw up

I screwed up something badly, and now I can't fix it. I've tried various methods and ways, but all to no avail. It's kinda depressing to see things get screwed up so badly when I've been putting in so much effort up till now. Talk about the randomness of things in the world, eh?

大失敗。悲しい。戻りたいけど戻らない。もう・・・

どうして？もう・・・