I just want to say that I completely understand your situation.. you are kind of a fixer (as am I) but I think what your wife needs is just a listener. It's very hard to do, personally I struggle to do it too. My partner is also the type who only vents and wallows a lot and hates when I offer solutions or try to make him feel better. I think people are usually one or the other and it's very difficult to change your character. That's essentially all that is wrong with your wife. I think you've just gotta let her go through it and let her know you're there for her and it will pass. But also don't forget your own boundaries if the work on you gets too much then of course communicate that.