Alright, say someone asks you to make a poster for an event. You agree, then a week later show up at his house with the poster. Said person takes it, and .... It's horrible.
Now in a normal situation, most people would say "you asked the wrong guy". Which isn't wrong, but in Riot's case, it simply doesn't work that way. Riot is the only one that can answer to people's feedback and ideas.
Forums might have asked for less stall comps, shorter games and whatnot, but that doesn't mean it's been done correctly. And in this case it's perfectly acceptable to call Riot out on it. In fact, they want us to do so. They might not answer much, but our opinion of the game is still important to them.
Also, a lot of the more annoying changes were actually uncalled for. Mastery changes, mana pots, sightstone nerf, even the tower nerfs (though I have a feeling that's more of a "change went bad" than "we just nerfed it") are examples that come to mind.
Personally as a support main I'm mostly pissed about the sightstone nerf. Having only three wards every back rather than 4 is extremely annoying, as warding both Tri and dragon basically means you either give up the lane bush or sacrifice dragon (as I'm not gonna let Tri unwarded). Pinks are fine, but some supports are better at protecting them than others, and matchups can make defending one impossible to begin with.
And what did we get in exchange? Being able to fuse it with our gold gen item? Would be sweet if we didn't lose the item active. Apart from frost queen, both FotM and Talisman are waaaay too good to pass up on. If anything I'd have merged it with Trinket :
Yellow : Wards regen naturally (1 per 2 min so you still have to back)
Red : If you mouseover your character while "dropping" a ward it activates the true sight aura temporarily
Blue : Lets you drop a Blue ward if out of normal ward range but in the blue trinket range (Maybe give some buffer range so players don't accidently drop their blue ward for clicking a bit too far out of normal ward range, but not a core necessity)
I dunno if they nerfed them so junglers wouldn't buy them, but nerfing it doesn't solve the problem. If anything, they should have buffed both jungle monsters and items so that rushing sighstone would make it almost impossible but buying normal jungler items would keep the current level of difficulty.
, never 
ever, not once 
has a champion ever been buffed to being too strong after being whined that they are too weak, just Riot's fault.
