By Conor Orr The Panthers squandered draft capital in search of a QB, whiffed on the biggest veterans on the market and now find themselves in worse shape than when he arrived. Panthers owner David Tepper’s signing Matt Rhule to a seven-year, $63 million deal in 2020 was no small gesture. For one, it angered fellow members of the NFL owners’ club, raising the entry price for unproven talent beyond the standard four-year deals they were accustomed to. But, more significantly, it was a gamble on the idea that a roster in need of rebuilding could be rebuilt by someone whose best efforts in that r…