Balance Posting Guide
It's easy to get caught up in anger over balance changes, especially if they're geared towards a champion that you play a lot of or if they're ignoring issues which you think shouldn't be ignored. That said, it's important to keep a level head if you want Riot to respect your opinions (and our opinions as a community). There are good posts, and there are bad posts. As a community we should strive to make good ones so that Riot does not have to sift through as much junk to hear what we want to say, and so that our opinions can be constructive and help them with their job.
Let me show you an example of a good thread: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/2tE6HFGx-is-anything-meaningful-going-to-be-done-about-varus
This thread is great because it presents the problems with the champion in a straightforward manner, presents a few options as solution and discussion ideas, and then proceeds to ask for more ideas from the community. This will generate a positive discussion, and if Riot takes time to glance through they will quickly see a bunch of useful ideas. If you want your ideas to be considered, this is the kind of thread you should be making.
Now let me show you an example of a bad thread: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/zWbe33YO-we-dont-want-to-touch-kassadins-ult-we-feel-like-it-defines-the-champ
This thread has a lot of upvotes. People are obviously concerned about the state of Kassadin and they don't like these changes, but that's literally all this thread has to offer. Rather than suggest solutions or better changes, the original poster merely says the balance team should be fired. This will not generate a good discussion, and is far more likely to just generate a bunch of angry posts with no constructive elements. It's popular because it's passionate, but it's also going to be ignored because it's angry and offers nothing constructive.
So to break it down in a tl;dr - Make posts that do more than identify problems. Try to give suggestions for your own and provide points of constructive discussion. Simply whining that you don't like a change will accomplish nothing. If you want Riot to care about what you say, then give them a reason to care.