If you work in software development for a decade or more in a corporate environment, you will encounter a surprising number of stakeholders who would like for the software project you're doing to fail, and will do everything they can get away with to make it fail. I did ERP implementations of Oracle ERP and SAP for many years, and saw this often. This can happen when the system you are replacing has the developer who…
Another thing I've heard about what some called the "Procrustean bed" of SAP is that it can get terrifically resisted by stakeholders because it insists on rational business processes, and plenty of companies aren't run very rationally.
My family saw that while computerizing one doctor's office in 1980: after the data entry was done, the printer would just not stop in the first accounts receivable cycle. Turned out the office workers sent out a fixed number of bills per month (something like 200?), no matter how many actually needed to be sent. They didn't totally understand what was happening, but they knew "the computer would tell all".