A finished partnership can still contain work worth acknowledging honestly.

When something ends badly, the ending tends to get applied backward over everything that came before it. The whole partnership gets recategorized as a mistake, which is tidy and untrue, because the good work was real while it was happening and does not become false later. Denying it costs you the parts you might have carried forward.

Name one thing you built with someone that you are still glad about, even now that it is over. You can hold that and the ending at the same time. Neither cancels the other.