How an Avs season so promising went so wrong

This will be a tough postmortem to perform, if, as it appears more and more likely, exactly how and why the Avalanche fell apart so badly in the second half of this season and missed the playoffs. I don’t really get it, folks. On Dec. 6, the Avalanche had a 17-7-5 record after a 5-2 win at the BB&T Center…