That is awful, and I know how you feel. What surprised me about your experience, was that the service was only 20 minutes long. I mean, that is extremely brief. I remember funerals being nearly an hour, at least. This was back in the '8o's. In the 90's a more structured online was given, and now it seems it has gotten even shorter.
I have to say last year I was extremely lucky with my mother's funeral. Even though I was offered the KH, I had already set it up at a funeral home. A long-time Elder/family friend gave a very non-normal JW talk about what my mother and that she believed in the resurrection. Didn't say a word about JW's, 144,000, etc. This is probably due to my saying ahead of time that I thought JW funerals were an infomericial for the WT. As it went, I was very surprised and you guessed it - relieved - that I didn't hear an entire WT infomercial. In non-JW fashion, gave this Elder and his wife $100.00 and told them to have a nice dinner out on me. Previously, my father and grandmother's funerals were typical WT commercial. Boring, mind-numbing, disrespectful to the deceased.
I bet you got a good dose of the "Love" that made you want to leave in the first place, right?