"Thursday Night Football" sucked for the Cowboys ... on the field and in the stands.

While the Chicago Bears players put a beating on Dak Prescott and company, the Bears fans were lumping up a bunch of Cowboys fans in the bowels of Soldier Field.

Check out the footage obtained by Barstool Sports, showing a group of Bears fans going all Mike Tyson on a couple of guys in Cowboys jerseys at some point during the game.

It doesn't appear anyone was seriously injured -- we're working on finding out if anyone was arrested.

Of course, the actual game went terribly for Jerry Jones and his Cowboys ... Dallas lost 31 to 24 ... but the game wasn't as close as the final score makes it seem.

Despite the ass-kicking, Jerry Jones insists he'll stick with Jason Garrett as the Cowboys head coach until the season is over.

Oh, and somehow the 6-7 Cowboys are still in 1st place in the NFC East and have a real shot at the playoffs. The Eagles are 5-7.