Everything.
no work life balance, don't even try.
no training, they treat you like you should know everything right way and if you don't you will be disparaged and talked down to.
no help, if you ask for help they will ignore you until things are dire, then blame you for not figuring things out sooner.
They tell you how they want things done, and if you do it that way they get upset that it was done that way and act like you are the problem.
If you want to learn their system, their clients documentation, etc you have to do it on your own time few hours before work or after, and that is after you study for some unnecessary certification that is required in the first six months of work.
If you don't respond to the manager in less than 5 minutes at any given time they accuse you of not being at your desk or working.
In order to do your job you have to remote into 5 remote desktops, Their system has a major outage once a month.