Suggestion:
1. Limit assignment and term of Elders and Pioneers. They should rotate periodically. Allowing them to serve continuously is a bad idea.
2. Never say/present in the Talks that you will help in marriage.
3. Make it very clear that you are no longer into marriage counselling.
4. Advise your flock to seek professional marriage counsellor.
Reason:
There's a popular saying "absolute power corrupts absolutely". I think long-times Elders and Pioneers are experiencing this.
Although everybody gossips, these leaders harmfully gossip about everything that happens to everyone. There is no confidentiality. This changed the expectations and perception of my spouse and worsened my marriage.
When the Elders then want to help, but instead promoted themselves and their intangible qualities. My natural respect left they evaporated.
Now no one will help to undo the years of eroding damage. Apparently, the Elders in my local congregation have exited marriage counselling.
In reality, family and marriage is not priority among Jehovah's Witnesses, especially when the Elders and Poineers stubbornly recommend to you to keep the kingdom first - which is spend more time preaching aimlessly and make service fruitlessly as "happy pill". All effort is done except to address the lingering family and marital issues.