Yup, be careful that you aren't fixated on making sure he isn't "getting away with" something. For me, walking away from the insanity and FUTURE financial drain was well worth walking away from some of what I was "entitled" to. It plain wasn't worth it to me. As long as I had enough to get along with (and yeah, that included taking responsibility for some debts that were his and not mine but I knew they wouldn't be paid and I'd wind up responsible for them somehow or other anyway), then anything I "lost" in the deal was simply the cost of freedom (which is priceless).
So for ME, going through the agony of some drawn-out process was absolutely NOT worth it.