Getting sick of this Master Yi & Taric Cheese

Seriously, this is getting so old I can't stand it. In plat 1 and especially in diamond, you see this nearly every 5 or so games. Theres practically nothing you can do about it either unless the ones playing it are truly bad. The fact that 2 of these champions can straight up just 2v5 is so absurd. I dont know why Riot encourages Yi to be this champion that can 1v5 easily, being the champion with the most average pentas by a long shot.