The talk had little to do with your father, by design.
The WTS discourages eulogizing the deceased and the Funeral Discourse™ outline stipulates that "the talk need not exceed 30 minutes".
The Funeral Discourse™ is nothing more than an Infomercial for the WTS, preying on people at one of the most vulnerable times of their lives. Fortunately, most normal people find the mere passing mention of the deceased's vital statistics as they relate to JW Service™ to be in such poor taste that it backfires, and makes them want nothing to do with JWs. In that respect, the Funeral Discourse™ is a huge public service announcement: it demonstrates precisely the value The Organization™ places on its members - if you can no longer preach or occupy a seat at the Kingdom Hall [even if it's because you're dead], you're barely worth 30 minutes of their time, even if you gave everything you had for benefit of The Organization™.
An old JW friend of mine passed away a few years ago - she was a Pioneer™ for years - even after she married and had children. She died of breast cancer. Her Funeral Discourse™ took 20 minutes, less time than what it took for most people to drive from their homes to the Kingdom Hall™. It disgusted me to know how much she gave of herself, the sacrifices her family made to allow her to Pioneer™, and once she was no longer productive, they spit her out like sour milk.
You have every right to be angry. I hope you find a way to remember your father in a way that celebrates the person he was. I like planting perennials in my garden - like roses, lilacs, lilies, etc. in memory of friends and family members who pass away. That way, when I'm quietly enjoying my garden, the lovely plants and flowers help to remind me of the positive things about those people.