Not defending the bashing of other brands and I have no personal connection to ZB but, I understand his "enthusiasm". He does have the best product on the market in Jeti by a wide margin and it must be difficult/frustrating to understand why more people don't "get it" and continue to put themselves through grief with Spektrum.
Without his efforts (Esprit has done all the FCC work and absorbed the cost) North Americans would not have the choice of using the best system available. You have to give him credit for that so, for those efforts, I support him.
Mike