This reminds me of when I was a teenager studying for my grade 7. I borrowed a cornet while mine was away having a repair done and stupidly blamed the instrument for my poor performance during practice. My tutor, an elderly gentleman, took the cornet from me and made it sing. He gave it back to me and said 'they all play a little differently but none are all that bad', now play. I can't remember his name, everyone was either Sir or Miss, but I remember the lesson.