Brad Stevens put his iron fist inside a velvet glove and met with the media on Monday, giving direct and blunt assessment of this Boston Celtics team and its loss to the Philadelphia 76ers . His midwestern charm was in full view, but it was undoubtedly covering an angry facade. And sometimes he could barely even do that. “This is hard for me to reconcile three days after the playoffs, because I'm pissed,” Stevens told the assembled media at the Auerbach Center. “I'd rather be playing New York tonight. We all would, but we also, as I look back, we didn't have a team that was as experienced or certainly as ready for that moment as we've had in the past … but when you're in the midst of it and you have a chance, you wish you could still be playing.” The team he put together was never designed for a deep playoff run, but as the season wore on, players blew past their expectations. Suddenly, the Celtics were lumped in among the league’s favorites.…