Generally someone complains every year that the current format is the worst format ever. However this year they actually might have a legitimate case for it. Now granted it was inevitable that a case would eventually happen if you complain every year a game is in existence. But I'll throw in my opinion on the matter and see if people agree or disagree with me. The reversal format was only bad because warp point was also out of the picture. I'd be willing to entertain a format with no catcher and with warp point(escape rope). I could even entertain catcher being a ace spec card.
As to why people feel the current format is the worst format ever.
The amount of decision making in the game has dropped by a lot since the release of catcher, and then dropped even further with the release of ex's. The bar is pretty low in terms of skill required to do well. For me personally the feeling of fun I had with a the game was when I had to navigate through a complex situation and then could pat myself on the back for doing well. I haven't really had that for about a year and 1/2. I think the game has been broken down into a very basic state where players who are experienced with the game may feel somewhat turned off. As fun as it is to see a mewtwo do 200 damage. It is equally unfun to see it happen over and over. Pokemon Catcher also doesn't help the siutaiton. It makes games go very quickly because all you have to do is combine a power ex and pokemon catcher and you can ko anything you want. This makes games go very quickly and lowers decision making. You might say that there is decision making with pokemon catcher. I would say that there is not as the choices for it are usually very obvious to any reasonable person. We live in a format where pokemon do a lot more damage than any pokemon has hp for very little cost and with trainers that make decisions very easy.
A lot this "luck" in the format is also a case of the average player being better than previous years. As a game gets more figured out, the average skill level increases, thus luck plays a more important role. So when the average skill level gets higher and the skill requirement for a average game decreases, people feel like there is more luck involved. Would they be justified in thinking so? I would say they have a good argument for it. People find it frustrating when they lose games that were simply out of their control.
I think there would be a lot more decision to be made in a game without a card like pokemon catcher, or if there was some limit or counter to it. With pokemon catcher in check, it would make it so many more decks would be viable and would make for more interesting games. And more interesting games = fun, which makes everyone happy.