Well of the machines we have owned
there are a number that have been the worst in a number of ways.
Wash results: Hotpoint WM52, just couldnt shift stains like the others.
Rinse results: Whirlpool AWM 5125/S, final rinse looks like a sudsy wash water!
Reliability: The WM52 again, broke down the greatest number of times in the shortest time period, 4 repairs in 4 years.
General build Quality: The Hoover AM 132 was the most "flimsy" feeling, but the WM52 sounded like it was about to drop to bits every time it span, so I'd say it's a tie between the two.
Cycle lengths: The Whirlpool again, 3hours for a cottons wash, what a joke!
Overall it has to be between the Whirlpool and the WM52 for the worst machine I've had personal experience of.
For me the award goes to the Whirlpool, because I'm a bit obsessive over rinsing and it basically just dosen't rinse. Also the stupid cycle times drive me mad!
Matt