Manchester United’s humbling 2-2 draw followed by a 12-11 penalty shootout loss to League Two side Grimsby Town on August 28, 2025, exposed glaring weaknesses, with Andre Onana enduring an awful performance and Diogo Dalot facing humiliation at the hands of lower-tier opponents. The Carabao Cup second-round clash at Blundell Park turned into a nightmare for the Red Devils, who were outplayed despite a late fightback, leaving fans and analysts dissecting the ratings. The full breakdown of this shocking defeat awaits below.

Onana, the £47 million goalkeeper, struggled immensely, earning a 3/10 from Manchester Evening News. His errors were pivotal, fumbling Charles Vernam’s 22nd-minute shot and misjudging a cross that allowed Tyrell Warren to score, putting Grimsby 2-0 up. Despite a penalty save in the shootout, his 90-minute display was labeled “disastrous” by Gary Neville on Sky Sports, with fans on X echoing, “Onana’s a liability—sell him!” His rating reflects a goalkeeper overwhelmed by Grimsby’s aggressive pressing, a tactic that exploited his hesitancy.

Dalot, typically reliable at right-back, suffered a humiliating 4/10. Outmuscled repeatedly by Grimsby’s Kieran Green, he failed to track Vernam’s run, contributing to the first goal. His crossing was off-target, and his defensive lapses left United exposed, with The Guardian noting, “Dalot was schooled by League Two pace.” X users piled on, with @MUFCWatchdog posting, “Dalot humiliated—unbelievable,” highlighting a performance that undermined United’s £60 million defense.

The team’s 2-2 draw, salvaged by Bryan Mbeumo and Harry Maguire’s late goals, couldn’t mask the shambles. Van Dijk earned a 6/10 for his header, but his 34-year-old legs struggled, while Quansah (5/10) was out of depth. Midfielders Casemiro and Mainoo, both 5/10, lacked control, with Slot’s substitutions—Fernandes (7/10) and De Ligt (6/10)—offering a brief revival. Grimsby’s 12-11 shootout win, sealed by Mbeumo’s miss, underscored United’s collapse.

Slot’s post-match presser was terse, admitting, “We underestimated them,” but deflecting blame. Grimsby’s game plan—targeting Onana’s nerves and Dalot’s positioning—worked flawlessly, with manager David Artell praising, “We exposed their weaknesses.” The 400-mile trip and eight lineup changes didn’t help, but the performance has reignited calls for defensive overhaul, with Marc Guéhi’s name resurfacing.

As of now, the story dominates sports headlines, with #MUFCShame trending at 1.9 million mentions. The full tale of this humbling defeat awaits below. Can United recover, or has Grimsby exposed a fatal flaw?