I'm not comfortable with a mitre being worn.
People should not be treating bishops like a king, and they are not kings. They are sinful men just like the rest of us.
A bishop should be more humble than to wear a "crown".
Are kings not sinful? Was it okay for the Byzantine emperor to wear a crown, despite his sinfulness? Is it okay for the Queen of England (a sinner) to wear a crown. If yes, then what really is your problem with bishops wearing crowns, imaging Christ's kingship? If no, it would seem your objection is not so much a theological one as a political one.
Wearing a crown in obedience to Church tradition does not make one prideful.
Also, frankly, bishops, while certainly sinful, are not "just like the rest of us": they have received special grace to be high priests in God's assembly.
The Apostles wore mitres, just like the Jewish high priest (as commanded by God in the Torah) did.