What frustrates me is that, despite recent incremental changes, WWE by and large doesn't try to get the best out of every person on the roster. They sign a bunch of great square pegs and try to mash them through round holes.
So, consequently, every time they sign a guy like AJ Styles or Kevin Owens they're making wrestling worse in two ways: they aren't maximizing the talent they do have, and they make other shows worse by signing away the talent that WAS being maximized elsewhere.
Kevin Owens/Steen is a prime example. He's still ridiculously talented and he's still entertaining, but a lot of what made him great in ROH can only be done in small doses, if at all, in WWE. No more blistering, profane shoot promos. No more package piledrivers. No more bloody feuds. No more "KILL, STEEN, KILL!" chants. "Fight, Owens, Fight" just sounds so much worse.
In promotions like Lucha Underground, literally every character has their own arc. Whereas in WWE, only 3-5 acts at a time really get to do anything important and the entire rest of the roster is basically treated like fodder to get them over.
It's also frustrating that WWE can actively shit on the style of wrestling that took place in ROH/TNA/NJPW/AAA/CMLL for 15 straight years, and then they can change their minds on a whim and suddenly everybody pats them on the back for being forward thinking.
It shouldn't have taken fans hijacking entire shows chanting for Bryan and Punk for weeks on end for WWE to relent and actually let them be themselves. It shouldn't take a guy like Styles getting a monstrous pop in his debut for WWE to realize he's someone they can run with. It shouldn't take ten years of the Knockouts Division making them look like shit to scrap the "Divas" division and give us real female wrestling.