was there a Damage Buff?

I have been dying a lot more lately, and I think not just bc I suck. I play champs like and build full tank for the most part, but it seems like champs I normally would not be afraid of are melting me even in early game. And I'm not complaining about late Game or or even a Fed , I mean taking nasty chunks of HP on auto atks. Like I was lvl 1 Galio and a Lvl 2 Cait killed me under my turret in 2 hits??? I'm not so new I am completely unfamilar with these champs and I used to know to avoid certain traps, ability combos, ults and power spike Items and could counter them with moderate success. But now it seems like none of that matters. I don't play AD champs or any bot lane ADC's so I don't know much about Lethality . . . is that what is going on? It isn't every match and God knows my adc's don't have this advantage, recently I played with a MF that couldn't even get a kill w/ her Ult with 3 of the enemy team stunned . . . SMH . . . Anyway I suspect this is a build thing they are doing or maybe something I am doing wrong, just curious if any one has any thoughts beyond, "Get Good".