It happens and that's just the way it goes on a rare occasion. Nothing can be done but suck it up and hope it doesn't happen in any more patrols. I've had it happen and many others have too I imagine. SHIII isn't perfect, that's why there's a score of mods for it.
Really tho, and not taking anything away from how you play SHIII, it can and will happen. As said, hopefully only the once. You'll have many more patrols STBW, with better results. Just chalk this one up to the gipper.
Don't mess with your config unless you really know what you're doing or you'll really screw the pooch for your career, and then have to start all over again.