CLEVELAND — Donovan Mitchell and the Cavaliers finally got past the second round and face-planted in the Eastern Conference finals.They weren’t ready for the Knicks or the big stage.The lights were too bright again.Cleveland’s season ended with a resounding, demoralizing and embarrassing 130-93 loss on Monday night in Game 4 to the New York Knicks, who swept the series and advanced to the NBA Finals for the first time since 1999.Playing on tired and wobbly legs after failing to put Toronto and Detroit away before seven games in the earlier rounds, the Cavs, whose fate was sealed when they blew a 22-point lead in the fourth quarter and lost Game 1 at Madison Square Garden, had no answer for anything the Knicks threw at them.They got out-played, out-shot, out-rebounded and out-coached.“We did this to ourselves,” said Mitchell, who scored 31 in the close-out loss. “We didn’t give our team a chance because we didn’t take care of business. You can’t play with your food. We had an opportunity in Game 1 and we blew that.“We had an opportunity, but give credit where credit is due.”And now that they’ve fallen short, the Cavs head into what will likely be a tumultuous summer that will trigger a major roster overhaul and perhaps other moves.This wasn’t the plan. Cleveland made a blockbuster trade at the deadline in February, sending guard Darius Garland, part of its “Core Four” to the Los Angeles Clippers for James Harden, who was supposed to take pressure off Mitchell.It never happened.Cleveland’s top player approved the Garland swap, but other than a few games here and there, he and Harden never truly meshed as intended. The Cavs, who shot just 28.9% (48 of 166) on 3-pointers in the series, never outgrew their growing pains.“This was the first time going through what we were going to go through,” said Harden. “Now we have to take another two steps and get even better. … I feel like we didn’t have a fair chance. We did play one quarter of Cavs basketball offensively. If you’re not making shots, you’re not going to beat anybody.”Harden has a $42.3 million player option for next season that he’s expected to decline to re-sign with the Cavs as a free agent. But the 3 …
