LongHairGal - I had the same experience.
When I was the Service Overseer or the School overseer, I would do my best to make sure elders who could not put two sentences together didn't come again.
Funny enough over time some of the other elders in my hall fought against it tooth and nail.
Not surprisingly to me it was those who also did not have the right to stand on a podium and teach anyone anywhere.
I took the position of being a speaker and teacher seriously and put my all into it, even going at my own expense to get training from top speechwriters. I did this because I really wanted to make a difference.
The better I got at it, the more glaring it became that not only were the lions share of JW speakers were inept, but those were often ones who wanted POWER and ADULATION!