Overreacting. Would you prefer this loss now, when they can still learn from it without threat of their season being done or in the playoffs facing Denver at home with home court advantage lost?
Aside from that, the moment Luka pulled his hammy was the moment Denver were almost guaranteed the 3rd slot. Now with Reaves done for the season any doubts were erased.
Facing an incredibly smart team like Denver in the playoffs will teach many lessons for the future. If they can overcome this year, that should provide the confidence that they can beat anyone, IF they play smart and don't fall into a 3 ball chucking contest. If they can't do it this year, it will still provide priceless experience for the young fellas moving forward.
For now though, no reason to freak out about a 2 point loss, in overtime, in freaking Denver; when both teams knew what was on the line, approached the game like a playoff game, and the Spurs had relative control almost the entire game.