I feel for you and definitely understand the challenges there are in making a campaign for FS2, as I'm working on a campaign myself. I hope you'll use the coming time to rest and figure things out for yourself. Perhaps, and hopefully, you'll feel the itch to get back into things and brainstorm new ideas you never thought of before. Taking a distance from something you're making, to return later, can be a good way to improve as well.
Either way, don't feel down, you made a good attempt to make a original story and setting. It's better to try and fail than not try at all.
Good luck with everything either way!