I don't know, MMario, it sounds like you have learning differences, which means that the way that those "excellent" teachers teach is not the way you learn.

Since a teacher teaches, and they didn't teach you, then were not really teachers(at least for you). And in spite of the fact that none of them could teach, you managed to teach music to yourself-- since you didn't know anything about music in the first place, that makes you a better teacher than they were--and since you managed to learn something from a person who knew nothing, I am sure that someday, when you find someone that knows something about both music and how to teach it to you, you will be able to learn--