Your absolute first priority is to raise this as an issue and make people aware of your concerns. Explain how you ended up where you are, what options are to re

Your absolute first priority is to raise this as an issue and make people aware of your concerns. Explain how you ended up where you are, what options are to remedy / alter the situation, and their relative pros/cons/odds of success/associated timelines. If you speak up and try to address the problems, you might be ok. If you sit silently, suffering, and then ultimately fail and have no reasonable answer to management's obvious question of "how did this happen?", then you're going to probably get hit with a big stick and you "quitting", might no longer be an option. Good luck.