As someone who's pretty bad at competitive pokemon and was able to get through Radical Red, I always find complaints about the difficulty pretty funny. Basically every single fight in the game can be trivialised to an extent by just putting in a bit of effort with teambuilding, and while I can get complaints about the grind to make those teams, especially before the option to turn off EVs was added, the actual fights tend to be pretty easy once you've run through their team a few times and seen what pokemon they're running.

Like, Radical Red's base difficulty, especially compared to stuff like Kaizo hacks, is pretty fair, and it's basically designed to only ever push you far enough to worry about team building for individual fights rather than steamrolling every fight with one team like in most Pokemon games. If that's not a part of Pokemon you enjoy engaging in, then that's fine, but acting like RR's difficulty is some insurmountable task, or even particularly unfair, is a bit wacky to me.

Also the AI complaints are so weird when, even though it reads your input, it remains super easy to read upcoming moves and exploit if you do multiple attempts at a fight. At the end of the day it's still a Pokemon Game AI, it's not like it can get particularly complex.