If my calculations are correct, Cardiff City have been beaten by five or more goals in 16 league matches during the last 50 years. Four of those defeats came at home (three at Ninian Park, one at the CCS) and 12 were away.

They were as follows:

1 - 6 v Sheffield United (H, 03/12/1977)
1 - 7 v Luton Town (A, 16/09/1978)
0 - 5 v Brighton & Hove Albion (A, 26/12/1978)
0 - 5 v Cambridge United (A, 13/01/1979)
0 - 5 v Bolton Wanderers (A, 22/03/1986)
1 - 6 v Port Vale (A, 17/09/1988)
0 - 5 v Maidstone United (H, 01/01/1992)
0 - 5 v York City (A, 02/10/1993)
2 - 7 v Cambridge United (H, 30/04/1994)
0 - 5 v Preston North End (A, 01/01/1996)
0 - 6 v Preston North End (A, 18/04/2009)
0 - 5 v Manchester City (H, 22/09/2018)
1 - 6 v Queens Park Rangers (A, 01/01/2020)
0 - 5 v Sheffield Wednesday (A, 05/04/2021)
0 - 5 v Burnley (A, 17/08/2024)
0 - 7 v Leeds United (A, 01/02/2025)

How many of those hammerings did you witness first hand? I was present at seven of them.