Liverpool inflicted a historic hammering on Manchester United on Sunday 0-5 on the stage of the theater of dreams, which turned into the theater of nightmares, is not the first of its kind in its history.

The Red Devils suffered many humiliating losses, most of them at the hands of their neighbor, Manchester City.

Throughout its long history, Manchester United suffered ten humiliating losses on its soil, including 3 results, 0 for 5 goals, 3 results for 1 goal for 6 goals, 2 results for 0 for 6 goals, and one for 2 goals for 7 goals, and the same with 1 goal for 7 goals. 
The results of these ten losses can be reviewed as follows:
Manchester United lost 0-5 for the first time in March 1893 against Sunderland.
In February 1955, he lost to Manchester City with the same result, before losing this October (2021) to Liverpool with the same result.
goal vs 6
With this result, Manchester United lost, in the Manchester City derby, to Manchester City in June 1926, and returned to lose by the same result with the same team in October 2011.
In October 2020, he lost by the same result to Tottenham Hotspur.
Zero vs 6
With this result, the Red Devils lost to both Aston Villa in March 1914 and to Huddersfield in September 1930.
2 goals for 7
Man United lost to Sheffield Wednesday with this result in February 1961.
goal vs 7
With this result, Manchester United lost to Newcastle in September 1927.
It is noted that the month of October is the worst in these results, as United lost 3 times harshly, while losing twice in September and the same in March and February, while losing once harshly in January.