I guess I just can't play any games anymore.

Good lord. Ever since about two patches ago every game I load into had me lagging terribly. When I used to be at a flat 35-40 ms for the entirety of a game I'm starting out at 80 and fluctuating anywhere between 80-120 randomly throughout the game, and that's when I'm by myself. Anytime an ally or an enemy champion roams up to me it jumps up to 400-500, and after that it goes even higher until i'm trying to reconnect. I REALLY don't think it's on my end because I just upgraded my local internet package not even two months ago, and any other game I play online yields no bad lag whatsoever. Has anyone got any suggestions? All I want to do is play my favorite champions and at least attempt to climb ranked, but if this keeps up I'll just have to uninstall and leave this game. It's a little foreboding to have everything BUT this game run perfectly fine with little to no lag at all.