you think it's bad in the USA you should try getting decent food here.Most of my Mom and Pop ventures were 20 to 40 years ago while working - I know litereally everything has deteriorated since then.
Took a Google Streetview tour of Bishop, to see if the Drive In was still there. Probably replaced by a Jack-in-the-Box oir an Auto Parts store.
Last time I was over there I put on half a stone in two weeks.
Having said that two independent places have just opened close to my work, one does an Aberdeen Angus burger that is outstanding.
Of course you can't have that every day as it's bad for you but luckily the other place does a good oatcake with bacon and cheese, so I alternate.
The 'Red Sauce' (as it is known here) is optional.