1st one is because the guy had the whiff of the century. He gave you a lot of time to line up that shot.
2nd one I will give you credit for hitting the flick, but hitting the flick was unnecessary. There was only one place you could be peeked from, so your crosshair should've been there anyway.
3rd one you are moving. You're off him in the demo recording, could've been on him in game but even if you were on him the bullet would likely miss.
4th one is legit, you preaimed roughly the correct place and height then hit a nice flick.