The artists aren't upset with their take. If they are it's because their own management has their hands deep in pockets, or just plain suck. Live Nation knows dam well who butters the bread.
The history of Live Nation is that it is the decedent of bill graham presents. You might want to go look at the history of bill. There is a statement about his funeral, and it having the longest lines of stretched black limos in SF history. It's probably true. Bill made everyone money, himself included as a "promoter" and every penny of that came from fans.
The music industry has been doing its own version of pay to win / loot boxes since the 70's. When they break up LN (if?) its just going to get worse as the greed is gonna just be right out in the open. The lesson of the last decade is that you dont need LN/TM to cover it up. Artist given choice will make tickets non transferable and just auction them off... the new starting bid will be the same as the current all in price.
It's greedy fucks all the way down.
P.S. As I have said elsewhere in this thread, I speak from having spent a few years working in the industry. Find someone who works in "music" like that and it's the same nonsense as game devs, long hours and shit money cause people are passionate...