lags after update, phone feels like burning after only a few minutes playing

na_

I saw a lot complaints about lags for months but I am feeling like this 17.2 is whole new level.
My phone overheats rapidly in just 10 minutes of playing, and performance drops drastically.
It's taking over 20 seconds to load a fight then another 20+ seconds to exit a fight... Cannot evade or block properly in fight. Even the champ selection screen goes unresponsive.

I am using Iphone 6, ios 11.x (I hope it's not my phone being too old)

unknown

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