This is where I disagree
Again I'm not expert ...but if a product meets it's design objective, accepted by end user and fielded in numbers is called successful project.
We'd like you to share your reason to call it a failure in very objective manner. At least let everyone know that what is the design objective F22 could not meet? Just saying it a fail project does not hold any ground. If you have something credible share it.
The F22 was and continue to be an amazing technology.
However, it had multitude of reliability issues, it didn't get to fly much, but still had numerous accidents. The F22 is difficult and expensive to maintain, and couldn't be counted on in actual battle.
The end user got distorted by politics, where it is mired by various interest groups.