Whenever a nail sticks out, you hammer it. The wheel that squeaks the most gets the oil. Saying stop complaining about everything or you complained about this now you complain about this is immature and completely ignorant. This isn't an autocracy. It might be an oligarchy, but at the end of the day, this is a league community. We all have our opinions, likes, and hates. Complaints are more so about opening up possible "imbalances" and things that can be worked on. Quite frankly, Ornn was op and the nerfs were only very little. Like when someone says turn your volume down and you turn it down one point from max vol. Anything to shut the community up and say they did something, but Ornn he still op. Just not as op as he was. Same thing for other champs. There is no 1 v 1ing an ornn unless they either A: miss all their abilities and keep auto attack cancelling or B: they sit still and do nothing. Why even go to lane when you know you cant do shit against him? Farm under turret? His waveclear is insane and his mana cost are extremely low so you'll be under turret all game. He can build in lane so he doesnt have to back and when he gets his items he can turret dive you. Tanks are supposed be able to 1 v 1 unscathed but at the same time, they shouldn't be allowed to have bruiser and fighter damage. It should take a team to take tanks down and a team to win fights as a tank. In this meta however, tanks simply win games whether your team is good or not. Period. Nobody is complaining about the true damage and crazy speed boost on fiora as much as they are about ap supports (Zyra, Sona, etc) and tanks now because although Fio is problematic, she's expected to be. She's a duelist and takes some skill to pull off a 1 v 3 despite her overloaded kit (cough cough). Tanks aren't expected to to 1 v 3 and come out with a triple kill and yet they do. Effortlessly. This is why the league community is bashing tanks so much. It's just unhealthy for the game to give tanks so much sustain, cc, and damage, at the same damn time.
Disclaimer: I might be exaggerating in some of my points but you get the picture.