Outside the massive comunity bias and blind sheeplike hate lee sin is probably one of the healthiest and funniest champions in the game.
his versatility and the maleability of his build makes him a variable champion that evolves over the course of the game, from an early game assasin-duelist to a mid game fighter and a lategame peeler. His high mobility provides a Outplay happy style with many creative outcomes depending on the player, this both looks good on the LCS and its fun to execute
the recent hate from the comunity comes from the Nerfing of his go-to counters, namely elise and the popularization of mage damage oriented supports that can't Land stunning or snaring skillshots on lee sin.
i'd nerf numbers not the playstyle