Easy as fuck to pick up ? WoW was harder game than LoL but LoL is infinitely harder to attain rating in, when compared to a game like WoW. ( playing WoW at highest level was more demanding than playing League at highest level, as you had to know every single spell available to yourself, your team, enemy team, and you had to know who you can focus, when can you swap, etc - League on other hand, has only the basic decision making element WoW had and most of it happens before teamfight anyway, you don't get to make decisions on the fly as much as you could in WoW; with that said, WoW was easier to get highrated in because you had control over people you play with, in League you get matched with randoms ( and I shit you not, you can go 5-6 games in a row where every single lane loses, that's dropping SHITLOADS of rating outside of your own control, cause either it's you who's having a bad game, or you can't carry 1v5 for people who're having a bad game ) ).
I never physically raged for anything WoW related, not even when S5 DK could interrupt my character from drinking 60 yards away with some instant cast that ignored LoS and range - , farthest I went was whining here on AJ about some class/spec that was retarded. League ? I broke two keyboards and severely crippled a razer mamba I had bought not even 7 days earlier. You're underestimating how hard it is to attain rating in League, that game turns even the most patient man into a violent psychopath.