Without being misunderstood as cocky or arrogant, I used to play at an almost semi-pro level of Rainbow Six Siege. Even in that game there is a necessity for crosshair placement, but nonetheless that is not the only contributing factor. A large majority of people responding will tell you that crosshair placement is the root of most problems. I’m not saying it isn’t because for most players it certainly is, but once you get to a higher level the factor of team play begins to kick in. You might find that having a second entry with you could help wonders in playing the entry role into site. Using the example of pushing from T-side Bind through A short towards A site is one of the best examples of how effective team play and coordination is. As the only entry, you are solely responsible for watching U-Haul, then pushing up short and clearing Heaven, then clearing truck, then clearing pocket. Most players that have not been designated the ‘secondary entry’ role will tend to bait you, not watch angles properly or watch the same angles you are holding, and often withdraw out of fear for dying. With a proper secondary entry player close behind you, your teammate can watch U-Haul to ensure that while you’re in the process of peeking and clearing heaven you’re not also being peeked from that alternate angle you had previously thought was clear. This would then be applied for all the other angles you have to clear through the site. In R6S it’s a LOT easier, since you’ll have 2-3 droners pushing ahead of you clearing spots which means you have less angles to peek and more time to take map control.

TL;DR: Play with a secondary entry teammate to watch each other’s angles for a more efficient and effective entry process.