To be fair he was hovering around 46.3% win rate for a couple of patches according to champion.gg, which is pretty low. As of this patch it has actually decreased to 44.92% so far despite the fact that he got buffed, though that could be in part due to his increased play rate.
As of the time of this comment (stats from op.gg, filtered for last 7 days and ranked solo):
All - 45.21% win rate - 93,745 games.
Plat - 45.58% win rate - 18,176 games.
Diamond - 47.74% win rate, 6,196 games.
Master - 55.19% win rate, 270 games.
Note that the win rate for Master is the only place where his win rate passes 50%, and that the sample size is very small and therefore not very accurate. Filtering instead by last month shows that he has a 51.66% win rate over 962 games in Master. We'll be able to access more accurate data as time goes on but this is about the extent of what we can use at the moment.
I know that the Boards don't like Lee because of how long he has been a dominant pick, but come on. He needed some buffs.