Chill, New York Jets fans ... your team doesn't suck/the season ain't over -- despite the crushing week 1 loss to the Bills.
TMZ Sports talked to Gang Green legend Nick Mangold after the Jets blew a 16 point 2nd-half lead at home ... and the former All-Pro who played 11 seasons for the team says he's hurtin' after the L ... but there's a lot of football to be played.
"That stung. Being up 16 to nothing with, I think, like 2 minutes left to go in the 3rd quarter, and to see it crumble away with the missed kicks, not really finding a rhythm on offense, not capitalizing on those 4 turnovers, that hurts.