Its funny how people say this is the worst Pre-Season ever since we started.
Its like people forgot Preseason 3
Welcome to the league of

Its like people forgot Preseason 3
Welcome to the league of

sorry but not even close, there's a huge difference between having ONE item be broken vs all the shit that is broken now
Preseason 5, patch 4.20:
+ Ult = instakill EVERYTHING EVER
Meh, league of cleavers broke like four champs. This patch we've got turrets with literally 0 armor and mr, soraka being the most cancerous thing since AP Yi, graves shitting on everyone in sight, blue wards all over the place, yasuo and trynd 1v5ing teams and coming out on top, all AP champs feeling awful to play, most junglers having to back after clearing two camps in the beginning, tanks being straight up unkillable because of the nerfs to armor pen and AP items in general, and buffs to tank items and masteries.
But instead of all that people are crying about not having mana pots.
EDIT: OH SHIT I FORGOT ABOUT 
Even with the leauge of cleavers, Riot still had a general direction they were going. It was bad, but there was a light at the end of the tunnel. Now it's just... everythings overpowered, towers are useless -- it's hard to forsee how Riot's going to fix everything, or what horrid meta they'll force for S6.
Personally I found the release devourer/feral flare situation far more asinine than the Black Cleaver, but I can see where you're coming from.