Certainly the cast majority of oil change services go well. We all get to pick our battles; what we wanna do, what we can do, how to spend our valuable time. I service numerous friends cars, for a number of reasons.Sorry for you. There are thousands of oil changes performed daily without issues. Somebody like you needs to change your own oil to prevent these issues. It baffles me how I can have literally 100's of oil changes performed-with no issues and others like you seem to have them. Strange isn't it?
Almost 2 years ago I bought a MityVac on a lark. I was an oil change snob; let it drain forever, new filer each service, etc.
Now I just stick the tube in the oil dipstick hole and let her rip. On one vehicle, I let the Fram Ultra go for 3 services, over 15K.
Our $60K GS350 F Sport gets the 5K service with the filter swapped every other time.
The engine has not fallen out as yet... All good.