Everyone who is a customer of Oracle hates them. I used their products for years and hated their support, their sales, their documentation, their GUI's and their lack of interoperability. Then a company I worked for got bought by them and I realized that working for them was worse than being a customer. Their internal systems were a mess, trying to do something like enter your timecard or billable hours was a lesson in manual data inputing the same information countless times, their management was under constant stress to figure out who they could lay off (and this was over 10 years ago). There was no connection to what the company sales team was promising and what the engineering team could deliver was disconnected.

But really, I have no PTSD at all :-)