the secret to doing good. usually when I play, I have around 120 ping and 35 fps. these streamers, however, have around 30 ping and 200 fps. the secret to doing good isn't being good, its have a better ping/fps than the enemy.
it helps a significant amount but it's far from the sole reason. There's plenty of people with great ping/fps but are just plain awful and there's plenty of people that play from new zealand and are still challenger (Kenste being one of them).
part of it is indeed having a good computer. i been lagging lately and theres a lot of ping issues i've been having lately as well. and it causes me to, for example, take more turret shots then i think i should.