"It's a complete lack of discipline," said Cooper. "It was embarrassing what we did."
Tampa Bay opened the scoring at the 11:48 mark of the first period when Anthony Cirelli banged home a rebound in front of the net after a Steven Stamkos shot from the right circle bounced off the right pad of Connor Hellebuyck and right onto the tape of Cirelli. It marked Cirelli's second goal of the season and fourth goal in four career games in Winnipeg.
Winnipeg's 4-on-4 goal came with less than a minute remaining in the first period and tied the game heading into the intermission, but the Lightning outshot the Jets 12-4 through the first 20 minutes.
The Bolts struck early in the second period and took the lead once again when Nikita Kucherov, who was playing in his 600th career game, took a pass from Ian Cole and ripped a wrist shot from the right circle that snuck past Hellebuyck. Cirelli picked up the secondary assist for the 100th assist of his career.
But Winnipeg answered again when Dubois scored his second goal of the game, deflecting a point shot from Josh Morrissey on a 5-on-3 power play to tie the game at two with 12:55 remaining in the second period.
Going into the third period on the road with the game tied at two, the Bolts were in a good spot to collect points on the final game of the road trip, but back-to-back penalties cost Tampa Bay again as the Jets benefited from another extended 5-on-3 and capitalized when Mikhail Sergachev's stick broke, and Kyle Connor scored on a one-timer to make it a 3-2 game with 14:22 remaining.
"Good on Winnipeg," said Cooper. "Honestly, it was really a nothing game going on. That game could've been 0-0 and a shootout.
"They stayed disciplined and just said, 'Sit back and wait for Tampa to screw it up,' and they did. That's what happened."
The Lightning outshot Winnipeg 11-7 in the third, but Morgan Barron's late empty-net goal sealed the 4-2 win for the Jets.
In the end, Tampa Bay just spent too much time in the penalty box and lacked discipline with stick infractions, delay of game penalties and dustups after the whistle.