It's been what now, three weeks that we've been in this problem? People have been questioning and theorizing the causes and fixes of this and all Riot has said publicly is that its not their fault.
I can do anything and everything else on the internet fine. I'm able to spectate games perfectly, load into games perfectly, but I'm still experiencing the problem when trying to play. 200 - 1,000 ping all the time. I now have 4 players who lost because of me because I couldn't play correctly. I have to stop playing until this is fixed.
I'm not alone in this. Freshly turned on computer with no unnecessary programs running in the background like torrenting or the like. No one else on this internet connection. Used to be able to play perfectly 3 weeks ago.
Edit : I thought I'd add that I was in three different provinces while visiting others during my Christmas holidays and each location had the same issue.
Edit 2 : Just now, spectating a ranked game since I cant play. Half the players disconnected and reconnected at once, a few times over. Its not just me.