Yes, you’re the boss, but you’re also a person. You make mistakes like everybody else, and you also have blinders about your performance, so solicit feedback. Solicit honest anonymous feedback from both employees that you like and those you really don’t. This will perhaps give you a perspective on your performance that you might otherwise not see.
Yeah, it’s true that your employees won’t generally be honest with you to your face, even if you beg them to, or promise that what they say won’t affect their jobs. So, maybe you could send out an e-survey, where they can offer feedback without providing their names. Getting these kinds of honest feedback can be just what you need to get out of your own way.