Entities mentioned:
- Manchester United: Pride, Legacy, Recognition
- Grimsby Town: Ambition, Competitive spirit, Recognition
- Ruben Amorim: Professional pride, Determination, Anxiety
- Jim Ratcliffe: Ambition, Legacy, Influence

Article Assessment:
Credibility Score: 75/100
Bias Rating: 45/100 (Center)
Sentiment Score: 25/100
Authoritarianism Risk: 20/100 (Strongly Democratic)

Bias Analysis:
The article presents a balanced view of the match and its implications, including quotes from both sides. While critical of Manchester United's performance, it also celebrates Grimsby Town's achievement, maintaining a neutral stance.

Key metric: International Prestige

As a social scientist, I analyze that this article highlights a significant decline in Manchester United's performance and reputation, which directly impacts the international prestige of English football. The loss to a fourth-division team in a major cup competition symbolizes a dramatic fall from grace for one of the world's most renowned football clubs. This decline could potentially diminish the Premier League's global appeal and, by extension, affect the UK's soft power and cultural influence abroad. The ongoing struggles of such a high-profile team may also reflect broader issues within English football management and development systems.