Quicken. Sells you the software, and then 2 years later it quits working because they want to you to buy a new version, bugs, glitches and all. So Quicken only rents their software. And if you don't pony up, you lose years of YOUR data. And forget about customer service. At Quicken, endless computer phone trees leave you desperate to talk to an actual person so you can stop wasting YOUR time and hopefully solve YOUR problem. But remember, at Quicken, YOUR problem is never their problem, so they couldn't care less.
Private equity: fund a startup to put these scammers out of business.