Rex Ryan Rips NY Jets for 'Stupidest Call Ever' In Loss to Raiders

"That's the dumbest call ever. There's no other way of putting it."

Rex Ryan just went OFF on NY Jets defensive coordinator Gregg Williams for his role in the team's epic 31-28 loss to the Raiders on Sunday ... saying the guy's last-play-of-the-game defense was straight-up "stupid."

"Dumbest call I've ever seen," Ryan said on ESPN's 'Get Up' on Monday morning ... "It's just stupid. It's just absolutely stupid."

If you missed it ... the Jets were FINALLY about to get a win this season -- all they had to do was play defense for 13 more seconds in their game against Vegas to seal up victory #1.

But, Williams inexplicably decided to all-out blitz Derek Carr instead of just playing conservatively ... and it all led to a miracle, game-winning 46-yard touchdown.

The defense Williams called was peculiar -- it left no safety help for the team's cornerbacks -- and several notable names in the NFL, including Tony Dungy, wondered why in the world THAT was the defense Williams chose.

"Just protect the sideline and the end zone and the game is over," Dungy said.

In fact, Carr himself was dumbfounded over it all ... telling reporters after the game, "I couldn't believe they all-out blitzed us."

Ryan couldn't either ... and the former NY Jets head coach didn't hold back when breaking down Williams' call.

"Not only was it the stupidest call ever, they don't even know how to run the dang Cover 0 blitz," Ryan said. "And you wonder why they give up 400 yards a game. You wonder why this team hasn't won a game."

"And the thing I feel bad about is for every one of those kids that have been a laughing stock of the league. The Jets have been a laughing stock of this league. And for you to put those kids in that situation, to take the moment away from them -- a win -- after all their hard work, that's just ridiculous."

For their part, the Jets' players weren't exactly pleased with Williams either ... team captain Marcus Maye told media members afterward, "I just felt like we could've been in a better call in that situation."

Hope Trevor Lawrence is really worth all of this ...