Yes. You stepped over the line trying to do the manager's job. ;) One manager told me he didn't believe person X's performance was a problem because the work was getting done. The work was getting done by other people. I once had a guy open a PR when 5000 lines of code, tell me "I couldn't get it to work, but here you go", then I and another person had to spend another 2 weeks fixing and rewriting it.