I'm not a particularly skilled player when it comes to Crucible. Do you know how I can get better? By playing against others that are as good as, or better than, I am. Pub-stomping doesn't improve anyone's skill set. Being challenged, does.
And quit using lag as an excuse to complain about SBMM. Use lag as a reason to demand dedicated servers.
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When connections are bad, skill does not even come into play. As such, "SBMM" is inherently flawed in Destiny.