I think the best way to give negative feedback is to indicate how the person is failing to achieve their goals, preferably in fairly objective terms, and how they would benefit if they improved. Preferably the improvement needs to be genuine (i.e. you'll be more effective and happier) rather than artificial (i.e. this matters for political reasons).
People don't want to listen to you if you're sniping at them for how they failed to serve you, but if you can indicate to someone a way they could more effectively pursue their own interests, you become a mentor and leader rather than a slavedriver, because you're showing them how to more effectively pursue what they already know they want.
For example, I knew someone who was trying to get his team to come in at 9:00 because the rest of the business was in at that time. If he put it in the right terms, e.g. "coming in at 9:00 will improve the image of our group and serve us better in getting promotions", he could have gotten what he wanted. But he pulled the "because I say so" / "fuck you, I'm your boss" card and flopped. If you manage from authority rather than leadership, the good ones leave you and the bad ones bring you down through incompetence if not outright sabotage.
People don't want to listen to you if you're sniping at them for how they failed to serve you, but if you can indicate to someone a way they could more effectively pursue their own interests, you become a mentor and leader rather than a slavedriver, because you're showing them how to more effectively pursue what they already know they want.
For example, I knew someone who was trying to get his team to come in at 9:00 because the rest of the business was in at that time. If he put it in the right terms, e.g. "coming in at 9:00 will improve the image of our group and serve us better in getting promotions", he could have gotten what he wanted. But he pulled the "because I say so" / "fuck you, I'm your boss" card and flopped. If you manage from authority rather than leadership, the good ones leave you and the bad ones bring you down through incompetence if not outright sabotage.