Look at his PICK RATE. With that pick rate his winrate should be 40-45 %, because bad lee players would bring down the curve HEAVILY. There is a reason why some low pickrate champions have winrates of 55%+ and are not broken, because they are being picked by mains only.
Lee at his considerable high skillcap with a high pick rate should have lower win rate, yet, he defies that rule, meaning that there is something wrong with the champion. And even before that his pick rates were in the steady 10%+ percentages, while many other champions struggle to get more than 1%.Lee single handedly defines the meta of jungle.
Riot should NOT gut a champion because of people being annoyed. However, such INSANE pick rate point towards there being something completely wrong with the champion itself.
And YES, they SHOULD repeat olafing and sejuaning. Why? BECAUSE THEY DID IT TO EVERYONE ELSE! Azir? Destroyed. Elise, destroyed. Nidalle, hell ever her destroyed. Riot always brings down the nerf hammer sooner or later with problem champions, yet lee almost never suffers that, despite defining the jungle meta for entire seasons.
They have been holding for FAR enough, and th fact that they NEVER hold back with OTHER champs (As exeplified by fucking sejuani) shows blatant favoritism.
We have been patient enough, there is time for action already. Patience is not an infinite resource. With your logic we should be patient until the end of days and just listen to every bullshit excuse Riot has in the book.