That is a sign of intelligence. But you say it almost as if it is not desirable. It is! Many people never learn to think abstractly, an ability that begins to develop about age 10-12. Some kids are well into their teens and not able to think abstractly at all. It sounds to me as if you are highly intelligent but seeing the worst in your gifts.

This is a basic suggestion and probably you have tried it, but have you tried practicing for the job interviews? Or just plain practicing having conversations? If you are expressing yourself in a confusing way, immediate feedback from the person might be a start toward helping you detect what is confusing to them and reword what you say. Just keep practicing until you get it right. It seems like your therapist would be a great person to do this with.

Just an idea....