When the pull request

1. has 100s of files with commit messages that make a very little sense
2. has the source files sprinkled with duplicate looking code having enough differences to screw my visual diffing ability
3. has too many changes combined when they can be independently reviewed and merged
4. includes me as the sole approver when I don't have enough context on the changes
5. includes references to tickets without any description, justification for the change, testing methodologies, test results, performance metrics comparison, etc. Literally none. It is as if the developer wants me to work with them from the Beginning