Yes I understand that this is your point.
Players have demonstrated to Riot time and again that they're not happy with what gets through the PBE though. PBE players tell Riot the stuff they're doing isn't good for the game. It comes through anyways.
There's only so long that people in general will respond to negative behavior with constructive criticism or in an all-around positive manner. Eventually when that doesn't work people resort to being rude and bringing their message across a different way. Wasn't it Einstein who said that the definition of idiocy was repeating yourself and expecting different results?
Players have tried during preseason 5, during the juggernaut update, GPs update, Fioras rework, etc... with somewhat positive replies to what Riot has been doing and RIOT KEEPS DOING IT. They're outright ignoring their players. So some people are bound to think that Riot is of the mindset that they can do whatever they want and we'll keep playing and supporting them anyways - and since they care about the game these players are trying to make it clear to Riot that what they're doing is not okay. If constructive criticism didn't work, maybe being rude and having an uproar is the way to go.
I'm not even saying that I personally think the updates are all around bad (although parts of these updates have been awful). Simply that Riot has done a TERRIBLE job of listening to its player-base and releasing good and balanced content. The majority of the major changes recently have been COMPLETE AND TOTAL FAILURES and yet Riot ignorantly cites them as successes. Yes, Fiora is now super popular, but that's NOT a successful rework. You could give Urgot 20% max health true damage on hit and he'll instantly become "pick or ban" (or just, ban) but that wouldn't be a successful rework now, would it?
I agree to an extent that players are being unreasonable. I'd want to at least let the dust settle and try out the changes before I declare them all total failures. That said, Riot has had a bad track record for me lately, so I don't have much faith in this... and I don't need to wait for Dynamic queues to know they are a terrible idea. If it takes players being jerks to get the message to Riot that they need to stop before it's too late then so be it. We've (or they've as I've not really complained about most of these updates) been nice long enough and it's gotten us Darius/Morde/Fiora/GP/Critamere/Critsuo/ADC-aggedon/Dynamic Queues/who-knows-what-else. Maybe it's time to raise some hell?