Stuck at Loading Screen, not my fault.

So, after champ select in the loading screen, after i reached 100% all the others frezzed, i thought "meh, maybe they have slow computers", I waited, like 5 minutes, hopeing to get in the game, then I open task manager, and I close LoL and I recconect, I reach 100% and nothing happens, I wait like 3 minutes, then I close it all and relog in my client, I recconect in the game and the game was at 14:00, then I get flamed by the teammates, strangely their adc was AFK too, so it was a 4vs4, now, I've been punished for "Being afk" is unfair.

First of, I would want to understand why this happened.

(My PC is very good and fast, and my internet connection is strong)