Leadership promotes their favorite employees, and will often targets those they don't like. It's difficult to develop your career when leadership doesn't like you. There are always changes, and communication isn't clear on when those changes go into effect. High workload, and little to no leadership support when you don't have bandwidth. You'll find the most success here if you agree to do more work when you're already stretched too thin.
It's a popular occurrence when employees get pushed or bullied out of the company, if a leader doesn't like you.
Cross departments continue to struggle to get along.
If you "speak up", HR supports leadership and management decision versus hearing out team members.