Unrealistic, arbitrary delivery timelines, so that someone looks good on their performance review, leads to cutting corners in development, testing and finally

Unrealistic, arbitrary delivery timelines, so that someone looks good on their performance review, leads to cutting corners in development, testing and finally accepting non-showstopper defects as release-ready. Oh, and I don't think teams working in AGILE helps, unless every team is coordinated with others so that no one steps over each other's feet (I've unluckily not been able to see this work). But this is not a modern problem. I saw this from when I started working in software 25 years ago.