Counterpoint there has been a measurable decrease in quality of most forms of media as more

No. The past had plenty of trash just no one remembers it. Which gives you the impression that everything was good. Survivor bias.

and more stuff are soulless cash grabs

When was it not?

. It used to be that games shipped completed, no

https://en.m.wikipedia.org/wiki/E.T._the_Extra-Terrestrial_(video_game)

and expect you to pump even more money into them on top of that.

https://creativetwilight.com/how-expensive-is-warhammer-40k/

Also I am not sure how the lack of value adds = lower quality.

The last move I saw that I cared about was Dune.

I agree. That 1980s masterpiece is one of the best sci-fi movies ever made.

Many of the restaurants near me have reduced their quality of ingredients and staff, now when going to the nearby sandwich shop my order is wrong more often than it is correct.

Well what do you expect after 3 years of people screaming about having to wear a mask and reductions of immigration?

What do we do when the world is measurably becoming worse?

Start by using actual data not anecdotes. No one is convinced when you talk like that. It sounds like every old dude I knew growing up ranting.