When you say failure what exactly you mean
1) Did not scale
2) Performance issues
3) Ran over budget
4) Ran over time
5) Lots of bugs
6) Feature creep
In your message you said unsolved usability issues. Typically usability issues should be solvable. My advice is accept the failure, learn from your mistakes for the next project. These things happen. Just move on.
Also 4 months is too short of a time to declare it as a failure. You can always pivot to make it successful
In your message you said unsolved usability issues. Typically usability issues should be solvable. My advice is accept the failure, learn from your mistakes for the next project. These things happen. Just move on.
Also 4 months is too short of a time to declare it as a failure. You can always pivot to make it successful