These are dishwasher about 20 years ago not modern. Modern dishwashers are so "efficient" that they are not really removing much. Often I am finding dished come back out also dirty after, so now I spend more water and time on a hand wash again.
Something is wrong with your dishwasher or drain system.
I thought the same, and then it turns out that my garbage disposal was broken and obstructing the speedy removal of waste water from my washing machine. Fixed that and now my dishes come out clean.
