If people hate ADCs so much, why not play Twisted Treeline?

Aside from LCS, I swear to god I hated this mode so much the past several seasons but because ADCs are just dominating the SR meta I've decided to try Twisted Treeline again and see what's going on over there. Oh boy was I in for a treat, the new rune system is just PERFECT with this game mode, and I don't mean in the balanced way. Almost every thing works exceedingly well EXCEPT ADCs and Assassins (except Kayn), the 2 most annoying classes to play against. In season 6 this mode was so infuriating to play since most other champions just performed better in Summoner's Rift, but because all "those" champions were nerfed and the snowballing is just as bad (or at least is was) over in SR, TT just feels a lot more fun in my opinion. I can finally play Mordekaiser, Skarner basically lives here (not literally) jungle clears are so fast, catching someone out as Ryze is hilariously easy with that little gap in the center of the map, and CS has never been so easy to hit with < 60 AD. Bruisers? Ehh, some might be about the same, even though I just described two of them actually being viable, but Darius and Aatrox is disgusting when fed.

I just wish that stupid mission included Twisted Treeline, not having a Vayne on the enemy team is almost a blessing, this includes ranked.