You don't want Rammus and Malphite in your games? How about you stop picking three ADCs every game and start to bring in some magic damage. I really hope people don't see them doing well and start to whine, bitch, and moan, saying they're overpowered. Personally, I am happy that teams are realizing the counterplay to these ADC-heavy team compositions and picking the two beefy tanks (and people who know me know that I really dislike tanks, as an ADC main). They are powerful right now in the current meta because teams are running usually a bare minimum of two ADCs, sometimes three or even four! Malphite and Rammus have long been counters to ADCs, and it is only natural that in this environment that they would shine. Yes, Malphite's kit is strong, and both have some good lock-down/initiation tools. To clarify, it's not that Malphite and Rammus are overpowered or anything.
I can quite honestly say that this is one of the very few times that I am happy to see them becoming meta, but I really hope that Riot doesn't see them crushing in competitive and feel the need to nerf them. It would appear as though Rammus and Malphite have both been seeing quite a bit play recently.