How do you know that there's anger behind the refutation?
Are you assuming or projecting?
Nobody in the NT ever referred to themselves as *bishops*. Paul rightly called himself an apostle.
Ac 11:30 14:23 15:02 16:04 20:17; Ac 20:28; Php 1:1 (1Ti 3:1,12), 1Ti 5:17-22. (Titus 1:5), (Titus 1:7) etc.
The NT used the term bishop and the term overseer interchangeably - especially Paul.
I love the actual meaning of the NT, not the derived meaning that one may assume upon arising each morning, or during a long session down at the pub.