The fact that you can't skip cutscenes.
Can't skip the very long end credits video the first time.
Shiny pokemon. Because I never find them.
Natures, EVs and IVs. I'm not going to waste my life away trying to breed the perfect pokemon. I can do something much better with my life. Like get wasted. Because that's always a great idea. :D If you like breeding then good for you. I just personally dislike it.
Master ball. I never use it. Why does it exist? It just sits in my bag doing nothing. I always paralyze my legendarys and throw Ultra balls until they are caught.
There isn't a "master repel" item. That would last 10k steps and would cost around 20k. How about that? At least you can nowdays use repels faster, but it's still annoying.
Battles and other animations take too long to finish. Everytime I go to Pokemon Center the fucker has to show it. I have seen my 6 balls on the table so many times during my 14 year old pokemon career that I'm so sick watching it.
Why do they always nowdays tease a romance. I love romance, but don't tease it! Do something with it.
Why can't the HMs be actual items? Like a surfboard, flashlight and a chainsaw. I need my chainsaw so that I can cut those trees god damnit!
Confusion. Lanturn with Confuse Ray. Goldeen, Zubat and Tentacool with Supersonic. Gloom with Teeter Dance. My god! Enough already!
Static, Effect Spore, Flame Body and Sturdy. I'm just trying to kill you. Don't make it harder.
Arena trap and Shadow tag. I don't want to fight you. I just want to run away!
That's all I can think about right now. The fact that I have played pokemon for 14 years is really starting to show.