What is with the balance in this game? I've lost FIVE promos in a row.

... basically, the title. Last night, I lost my first promo because of a Master Yi who took on my ENTIRE TEAM alone, and killed all of us -- and he ended up with full health. Then every promo after that, it was because of Vayne, Riven, Warwick, Annie and so on who would just destroy everyone they targeted. I've gotten to my promos five times TODAY and lost every single one because of, honestly, retarded game design.

So, I'd sure love for anyone in Riot to explain how each of these types of champions is even REMOTELY fair or balanced to play with / against.

First, the most braindead, pathetic, simplistic champions in this game do the most damage, most of the time with targeted abilities / auto attacks. These are champs like Annie, Vayne, Tristana, Jinx, Yasuo, Riven, and every other champ who has no skillshots, has very simple mechanics, and has damage that's so beyond ridiculous, even at level 1, that they can just instakill people early game with little to no effort. To contrast that, we have champs like Azir, Ahri, Ekko, Jayce, Nidalee and the like, who have more complex mechanics and require a bit more thought / effort / planning, but their damage just pales in comparison. Not only can you easily dodge skillshots, but the damage values on all these champs are just so much lower than their easier counterparts, why would anyone even bother playing them? If you can perform better with less effort, why wouldn't you? I enjoy playing the harder champs because they're more fun, and playing something like Annie or LeBlanc feels like cheating because I can just annihilate people without even trying (my very first game with LB, I annihilated lane and went like 19/2). How is that fair? Less effort and less skill required but greater reward?

The next set of horribly designed champions is what Riot likes to call a tank. Braum, Malphite, Alistar, Garen, Rammus, Darius and so on. They are nigh unkillable unless your entire team is there to help out, but they can kill anyone who's not a tank with relative ease. A Garen can kill a squishy person in about two abilities, a Malphite can just Q you to death, an Alistar can throw you and then just auto you to death, and so on. It doesn't matter if you can kite them or outplay them, because you can't hurt them enough to make a difference, and they all move faster than most champs anyway thanks to Dead Man's. How exactly is it fair that you can be, for all intents and purposes, invincible, yet simultaneously incredibly bursty? Sure, most tanks lack mobility, but what does that matter when they can just CC lock you into infinity and kill you before you can even get away?

Next, I have a couple special cases:

Master Yi. He can turn invincible at will, he can lifesteal faster than any ADC can hurt him, he can kill tanks near instantly (and squishies don't even stand a chance), and he can turn his MS to light speed every minute or so. I've seen a Master Yi take on an ENTIRE TEAM and win with ~90% HP before, and most of his damage was auto attacks. I fail to see how someone so incredibly bursty and strong is balanced when the only way to kill him is to CC lock him so hard that he can't auto anyone even once ('cause then he'd start killing you).

Next up, Vayne. Once she gets a BORK, you may as well say goodbye to ever killing her with less than a small army. Lucian is an ADC built to be bursty, right? I was full build (Triforce, IE, Berserker's, Shiv, LW and BORK (50% crit, ~2.00 AS, ~300 AD), and unloaded EVERYTHING I had on her, and she still won. She was full glass cannon, and lived because she life stole more than I could deal (and I was critting for 1k + 500 with my passive, as well as Shiv going off)... How is that at all fair? She's squishy, but the way she builds makes her invincible unless you chain CC her -- and even that doesn't work well, since she can turn invisible at will every two seconds.

Finally, Warwick. Before Sated, he was already incredibly annoying, but now, he's just a god. He heals more than anyone can deal, he can push R and guarantee your death (even if you QSS, he can just kill you afterwards), and he marks you for your entire team (all while moving faster). I just... I don't even know what to say. He is literally invincible when he has a sated, and unless you chain CC him (gee, I'm seeing a pattern here), he's going to kill anyone he pleases.

So, maybe I'm just bad, but how is it fair that braindead champions can perform so, so much better than anyone else? How is it fair that someone can be simultaneously invincible and stupid bursty? How is it fair that the only way to "counterplay" a handful of champs is to spam CC at them (which you won't always have)? I just don't understand it. Does Riot actually try to balance their game? It sure seems to me like they don't.

I don't know, I'm just tired of losing promos because of champs that I can't even compete with.