Google for example has almost no way to reach customer service, even for their paid products. When it works it works great, when it doesn't God Help You.
Ditto Uber/Lyft/other cab companies, where there seems to be no end of people who were put in seriously unsafe situations and were unable to get any attention to their issues until they blogged about it. Who knows how many cases we haven't heard of because they weren't able to get their concerns to the top of Reddit/HN/wherever.
This sort of thing happens in any low-margin business. Not only is there not enough money to hire good customer service, but what little customer service exists is not empowered to make things right for the customer, because thin margins and $$$.
It turns out that keeping spare rooms on standby, generous rescheduling/rebooking policies, and all the niceties we associate with hotels are powered by the fatter margins they enjoy. The big innovation we've made in the last few years is making low-margin low-rent business models seem boutique and high-end.