Hi - PM from Retool here. Have you tried our product? Should be super easy ~5 min to spin up a table + form CRUD application for your database tables. Plus, we can be deployed on-premise with SSO and source control.
+1 to this problem space. Resonate a lot with the gaps with Zapier, particularly around the need for escape hatches/conditional logic when needed––one of the reasons we built Retool Workflows! https://retool.com/products/workflows/