The appointed Counsellors and Auxiliary Board members are responsible for the 'spiritual well-being' of the community and 'advising' Assemblies, and in practice they fulfill all the functions of priests while the Faith also claims to have abolished clergy. The main difference as I see it is that usually clergy have to academically prove themselves knowledgeable about the religion in a formalized way, whereas in the Faith it is as you say an opaque process mostly built on brown-nosing and interpersonal politics in order to work ones way up the appointment lists.
Around the time I resigned a lot of very sincere young active Baha'is were cutting themselves off from the religion as well, not formally resigning since they still believed, but creating space due to immense stress from pressure being put on them by ABM's and Counsellors to try and get numerical results. In my opinion the KPI's of the Faith represent the ABM's and Counsellors 'job application' to get appointed to higher honors so they have a vested interest in crushing the spirit of people under them to try and get good numbers and a promotion like any good (bad?) capitalist enterprise.
The whole religion has become even more bureaucratic and opaque as in my country at least, and I assume most of the Western Baha'i world since Area Teaching Committees have been established. These committees appointed on the advice of a Counsellor. Another new-ish administrative body are Regional Baha'i Councils. Area teaching committees informally "outrank" Assemblies, calling meetings of LSA members in an area to coordinate them on teaching campaigns. The Regional Councils are elected by LSA members in an area (or are just straight up appointed by the NSA) and of course it is no surprise that ATC members are the people elected to the Regional Council. Following on from that of course it is Regional Council members who are elected to the NSA, so what it accomplishes is an ouroboros of administration where appointments control elections and ideological purity can be maintained.
The punchline of the Faith is that despite the complex multi-layered bureaucracy with dozens of institutions and roles constantly expanding and more firmly asserting its centralized control, the community is still shrinking year on year in most western countries and hemorrhaging active Baha'is.