Really burned out by the recent project on which I'm working on. The base code written by the previous developers is so bad, my team members and I have to work

Really burned out by the recent project on which I'm working on. The base code written by the previous developers is so bad, my team members and I have to work 9+ hours on a recurring basis to just fix the bugs caused by this buggy code. I'm just tired and burned out by this. Sorry for my rant