..."any thread he involves himself in quickly degenerates..

Shouldn't that be "exposes himself in"?
.........................

The default mode of converse for people in the British Isles tends to be ironic. So generally speaking, ostensibly rude remarks about banjos from this side of the water are best understood as really having a friendly intent.

If there really are people around who really dislike the banjo as an instrument, I'm sorry for them. Of course, like any instrument, it isn't always played as well as it deserves; and that is accentuated by the fact that, sometimes, people who don't play it too well set it up so that it is over loud. But that can apply to many instruments.

I think banjos sound a lot better without resonators.