What’s a huge red flag or warning signs, that your managers or coworkers will potentially step on your toes or undermine/sabotage you on the way to success?

Just have been thinking about this, what are some tale-tell signs that a manager, leader or employee will attempt to undermine you or sabotage your career? What are some things that they will say or do? I think we should also look out for predatory coworkers too who are corporate shills looking for their piece of the pie, at your expense.