Expensive and underperforming products are sold for millions every day in the enterprise software industry. That's not due to their engineering or UX, and certainly not to their customer support, it's mostly professional sales in action...
I suspect that engineers who work in enterprise software would strongly disagree with you. I've done consumer stuff for the last 8 years, but I started in enterprise software, with 2 different jobs and a few internships over the first couple years of my career.
The big challenge in enterprise software engineering is that your "customer" is the person who forks over money, not the person who uses the software. Pretty much all engineering effort is devoted to pleasing them. Engineering requirements for enterprise software are often insanely complex and sometimes even conflicting, and most of the engineering effort is devoted to satisfying them.
If you look at product/UX debacles like Taleo or Lotus Notes from the perspective of a department head buying them (rather than from the recruiter, job applicant, or ordinary worker who will be using them), a lot of enterprise software makes sense. There's a lot of effort devoted to reporting requirements, to making sure the buyer has visibility on what all of his department is doing and conversely can make that "productivity" visible to his boss, to covering one's ass with regulatory requirements, and not much effort devoted to making things pretty or productive for the end-users. That's because the end-users are not the buyer of the software.
Indeed, a lot of the investment thesis in consumer/smallbiz Internet is this idea that software should replace middle managers entirely, and so the end-users should be the actual buyer of the software who need it to make money, basically replacing management with markets.
