Wow, the game is so much different at the top. Tofu is annoying for sure, I play in Gold / Diamond and rarely see it...
I can understand how you feel, fighting the same teams over and over isn't fun at all.
Maybe rent out your max deck and become a gold player 😀
(Not meaning these problems are irrelevant, they should be looked after)
It's Tofu's usage + win % that is through the roof. Here are the 10 most commonly played summoners in Modern Champ and you can see, of those battles, Tofu alone makes up ~45% of all the summoners used; winning at a 65% clip. Wow!