Sheesh, that looks rough... the SI is hard to grasp, and in such cases, completely annoying. Then again, if the window didn't carry, your tower would've collapsed just a little sooner.
Doesn't help now, but keep backups ..
As for the "I don't want to play anymore" .. it'll pass, pretty quickly. Take a break or not, test some SI stuff in creative while at it and most importantly answer this; was the base awesome? If it was, the time was well spent; all the time poured into a game will eventually be entirely wasted. It's the trip that counts. Take a break, you'll be right back - you can't build that kind of a thing anywhere else ..