Management and unskilled brownnosing staff.
Clueless and heartless management. Long hours with no appreciation. They will burn you out and throw you away like discarded tissue. Look at the constant turnover. It's hard to be productive if you're constantly looking over your shoulder to see if the dim witted managers are looking to fire you for non-logical or unexplained reasons.
Don’t allow you to do what you are hired for.
Management, hovering over you for 8 hours a day, pushing you constantly to work harder and faster. Quality is garbage because of this and why the same issues arise time and time again due to rushing and never addressing the root cause of anything.
Very poor management
Keeping on top of all the changes in a rapidly evolving industry.