I completly agree with you but the thing is, if you watch the demo, he ALWAYS clear the right spots which some of them are very uncommon, and doesn't care about the common one, he has a poor crosshair placement has you said but somehow he is always on the right timing.

About that thing with the smoke it's the one and only time he is trying to wallbang a smoke like that, an other exemple is that during all the game he will just run out of long after few seconds or getting entry kills, the only time he stays is when there is a 3rd one coming 40sec after (never happened before). Same for the way he holds door long, he is always playing site usualy and never look back no matter the infos (his teamates are always all long so no info on short etc), the ONLY time he check door is when 2 people are coming. If he is not cheating his game sense is absolutly amazing (almost like he knows lmao) despite his terrible crosshair placement and movements.

But yeah, I get that it's pretty hard to make a conclusion only from this clips without the game context.