I don't like those shows and quit watching them for the reasons you gave. I'm also a little ashamed of them because I try to be a good ethical hunter and would like people to have a positive view of hunting as a human activity. I've taken quite a few animals, and have been with others that did too, and we have have always been glad for the kill and relieved when it was a clean and quick kill. There is usually some handshaking and a lot of awe, like "That's a big beautiful doe" and the like.
I'm not against trophy hunting, but just don't do it. I hunt for meat, and really don't want trophy animals. I like good representative specimens.
In fishing, I do catch trophies pretty regularly, but don't specifically target them. I like to leave the big old fish alone. In the case of, say, northern pike, it takes so long for them to get big that ten point bucks are a dime a dozen compared to big northerns. A big fish can easily be 20 or more years old, and just killing them takes an important resource away from the population of spawning animals. Same with sharks. I used to enjoy shark fishing until I found out how long it takes for them to grow to say six feet long. Some specie like dolphin (mahi) grow really fast and there are no old fish, and I have no problem fishing for the big bulls because I know the population is healthy and big fish are soon replaced.
About those dolphin (mahi), a 50 pounder may only be four years old. That is amazing growth for a fish! A northern pike that old may weigh barely 2 pounds, at its typical latitudes.