Not so sure I understand this one. The only feedback you'll ever get you interviewed OK was if they offer you a job. You may have been fine, they just hired someone else who they felt was better fit. Or you wore the wrong tie.
To me, interviewing falls under the classic Judge Judy comment: If you tell the truth, you don't have to have a good memory.
Being a great interview but an incompetent fool at your job probably won't work out too well in the long run. And if your communication skills are so poor you can't interview well, that is also going to catch up with you in the long run.