Tanky DPS does in fact dominate that map. I do play it, and I'm ranked decently in it. That's the meta, that's what's strong, deal with it. Yes it is imba, yes the game is balanced around SR, yes there are champs that are straight up broken, no they don't get played in ranked cause they get banned. Normal TT is dumb because it's one jackass per team picking one of the broken champs and carrying two baddies. Yes some squishies are decent on TT, but they need the right team to make them work. Sivir is bad on TT. That is all.
tanky dps do NOT dominate the map. At all. Some of the better champs for the map aren't tanky. And be tanky is a build more than anything so blame builds