Past is past… Move on!
You cannot change the past, but you can most definitely influence your future.
If you are spending time pondering over the past in an attempt to resolve chronic issues, the only outcome would be wasted energy and strained relationships.
If you believe that a problem from the past can be solved easily, it was never a problem in the first place. If you know it cannot be solved fairly, why deal with it at all?
Most times, the only solution to the problems from the past is to forget them and to move on! Pretend like nothing ever happened! Things will be easy when you shed off the baggage.
If a fair settlement is possible in a reasonable amount of time, spend time. Else, take the learnings, start anew and move on.
Can you possibly do anything in the past? If you can’t, how can you presume that you can solve something in the past?