Judging by their APIs...
Having done several dozen various API integrations, I have found that the condition of a company's APIs almost always mirrors the general internal state of that company. Twilio for example: Clean and easy to use APIs, well designed. Turns out that Twilio is quite easy to deal with, top notch service.
PayPal's API's and services are disasterous. They have many 'products' with very similar names, that I honestly can't tell the difference between. After weeks of wrestling with various versions of APIs, and much contact with their 'support', it turns out that we were using the wrong API the whole time, that is why it wasn't working properly. We were using the API they told us to use!
I don't see PayPal as being evil so much as incompetent, and they have been that way for well over a decade. They want to talk about innovation and adding features, that's insane. They stuff they have now doesn't even work right. Clean up your mess first PayPal, get your 'products' in somewhat resonable condition.