The weekend was due to organized religions. The Atlantic has a great article on the history of it. Henry Ford pioneered the 40 day workweek without union prodding, only through his own experimentation.

Besides, let's say youre right and unions have given us all those things. Those standards are over 100 years old. If it were true, it would mean nationwide unions did some things 5 generations ago and have collected literal trillions in inflation adjusted dues* since and have provided nothing in return.

* 11% of the US is unionized, representing about 1.1 trillion in annual payroll. Average union due is 1.5%, that's $16.5B per year in union dues collected, over 100 years = $1.6 trillion. But union membership used to be much much higher than 11% so its actually a much bigger number than $1.6T. But you get the math.