Horseshitly
An adjective describing the condition where a particular system or device is designed in such a way that is manifests feelings of betrayal or disbelief in it's user, so much so that it feels like it was constructed to illicit said feelings in a purposeful manner.
Upon observing the documentation of the insurances companies API Jennifer gasped in disbelief, her inner monologue shouting "This API is designed in the most horseshitly manner I have ever seen, how in the hell do people integrate with these clowns!!???".