The common thread is that all these tech giants concentrate on scaling their ability to deliver the product and generate revenue, making service for exceptional

The common thread is that all these tech giants concentrate on scaling their ability to deliver the product and generate revenue, making service for exceptional situations a lower priority, with solutions that do not scale. While you are consuming product and paying, you are basically identical to everyone else doing that (except for your varying personal info). That can be scaled in straightforward ways. If you have some problem that requires attention to your account, that doesn't scale well. Even if it could, it's not worth it to them; it's off the happy, revenue-generating path.