All the games since then I have found the main story easy. I complete most in 8-12hours(Sapphire took me 212hours).
8-12 hours? Wow, that's really fast.
Additionally, gym puzzles (I'm lookin' at you Morty) and some of the other puzzles in the game were quite confusing to me when I was a kid. Fortunately, I used to read the text and talk to most people, otherwise I'd have ended up even more confused.
Looking back, I believe I did get stuck in a few places. Sevii Islands 4 to 7, catching Mewtwo (Fire Red, of course), Fortree City in Sapphire and probably some others. But there was already someone who'd beaten the game to help me out
And apart from obvious ones like Water > Fire, type matchups can be hard to figure out (though there's always that helpful dude at the Gym entrance), especially if you don't watch the Anime. I, fortunately, had the experience of the Anime behind me,
though I was shocked when "Aim for the horn" didn't work in the games
btw, I've voted 3/5 on the poll, that's more of a rookie trainer point of view though.