I am going to assume you have seen Tiller and decided to roll it yourself? Tiller uses Google sheets and automatically connects to all your financials and organizes everything. $5/month for the service.
This reads like another one of those “break up letter” posts where you are justifying yourself after the fact. You can leave and not ‘have to’ justify yourself for leaving, I mean, the only reason to write something like this would be to try to talk yourself into believing you made the right choice.