League Of Tanky DPS

I am on a 14 game losing streak in ranked and back into silver now after last patch. My idea of a balanced Moba comes down to a simple scale. On one side you have tank champions with high health and low damage and on the other low health with high burst/sustain damage. Everything should more or less fall within that scale to stay balanced, however after the last patch its seems I have to play the champions I despise the most which is tanky champions that deal burst or high sustain damage and low cooldowns to the point of where balance seems thrown out the window completely.

I don't get it, champions that can have 3200+ life but can do just as much damage in burst or sustain as most other champions. I understand their is a bunch of holes in my logic but do you understand how entirely frustrating it is when you drop all abilities on a tankish champion and not only will they survive through it with more than half life left but they then kill you back in mere seconds? I know that every champion has its weaknesses but to me with the 1000+ games Ive played League always favors tanky dps champions and nothing I say in the forums, RL, in game, or after games will change it. I've spent far too much time and money to just give it up and go play Dota 2 or something, I've been playing Moba since Warcraft 3 mod and while I am by no means a pro player or extremely good... I would say that I have alot of experience and knowledge to what makes these games fun, competitive, and balanced.

As of the newer gimmicky champions and this "tankey dps > all" feeling is getting to me, I can't be the only one right? I've even seen Riven on a number of occasions get camped top and shes 0-6 then when mid and late game arrives, she then ends the game later at a 14-8...how is that possible? (that was rhetorical) And the same can be said for mostly all the tanky DPS champions.

Perhaps I'm an idiot and I need to just vent it out, but ffs with how many games under my belt why do I still feel this way about tanky DPS champs after so many games, patches, new champs, and years of MOBA experience?

Worst offenders imo:

Too Tanky AND too High damage/escapes. All I'm saying is pick on or the other, but you can not get both. And I say that knowing full well most people won't agree with me.

I understand that at higher ELO's everything is counter-able and any champion beatable but where talking about the 10% of the player base of the entire game, and I just want to see a better overall balance for the majority of players.