Let them. Doesn’t mean you have to engage with them.
The alternative is that you run the risk of not fostering an inclusive environment for all opinions, even the bad ones.
To be clear I agree with your points about the negative nancy types. I’ve been here long enough to see that it’s pretty much the natural order of things.
We have not taken a ton of long shots so far so I wouldn't say he's been ripping it, but his velocity seems good to me on most of the throws that require some zip on his throws. The far hash out throw seems very good to TY, the zip on some of the bullet passes down the middle seems good, too. His one shot to TY downfield looked great too. I'm not worried about his velocity. I want to see us take some more shots though. This is more on the playcalling than on Rivers though.
I think he's been good and very efficient overall with what he's been asked to do. Definite upgrade over Jacoby.
As far as abandoning him, what gave you that idea?
As far as developing, no way to know. All we are going to hear is when Reich or Ballard speak the coach/speak.
Before assuming he is ready there are questions needing answered.