I hate to defend big business, but I think you may be comparing apples and oranges in your vendors. Most vendors in this business are 1-4 man shops. When you run a shop of this size it is incredibly easy to bend SOPs to take care of a customer. But PSI is really the gorilla in our hobby here. They started in 1936, roughly 10 mill in rev and roughly 50 employees (from web info). The only way you get that big and survive is by all people following the same page, standardization, clean operations. They are just not setup to make those kind of accommodations and their employees are not empowered to do it.
Now how do I know this for a fact. In the last 15 years in my industry I started and sold a small business with 9 employees, then went to a friends company, became a partner, where we took a regional nationwide. We went from 19 employees to 79 in 19 months. We then sold the company, as the gorilla in our industry made us an offer we couldn't refuse.
My first company could have never done what my second company did. We didn't have the discipline of standardization and operations. All my staff were empowered to take care of any customer needs. On paper that was great, and we were successful. But it limited how big we could get.
I didn't mean for this to be this long. But I have had nothing but good experiences with PSI, understanding who and what they are. And I do respect your right to vote with your wallet based on your experiences. Just some food for thought.