Have they fixed the bug where spells randomly do no damage? Nope.
Have they fixed the bug where turrets sometimes don't pick aggro properly? Tried, but failed.
Have they fixed the bug where pathfinding sends people in weird directions and gets them killed? Nope.
Have they fixed the bug where wards put in a bush sometimes don't see inside the bush? Nope.
Have they fixed the bug where hitboxes don't match the character models very well? Nope.
Have they fixed the bug where players can flash or Zhonya's while they're CC'd? Nope.
Have they fixed the bug where the camera gets stuck on your player while you're dead sometimes? Nope.
Have they fixed the bug where if you move too soon after an autoattack, the shot shows but does no damage? Nope.
...
And all these have been in the game for months or years. As I said, let's not cherry pick here.