Your subordinates' dissatisfaction with you is your problem. Find out the problem and solve it. You have become a restaurant manager. I believe you can handle the relationship between superiors and subordinates.

Have a measure! It must be that you didn't do a good job and have a good relationship with employees! In this way, you can be a manager. To be a good leader, you should be a good person first.

Your boss agrees. After all, the restaurant belongs to the boss, and he can do this business without your partnership.

Incorporate their thoughts and think from their perspective. They will all become your friends before long.