Black was not easy. If you ever tried to Nuzlocke Black (or maybe even not that), you will find it quite impossible. Gym 1 is impossible without a bit of grinding your monkey, and even then they have Work Up so you are not guaranteed to win. Next, if you don't have a Roggenrola or Sawk, Watchog is killing at least one of your mons. Ghestis's Hydreigon is also a gigantic pain in the ass because it will likely outspeed you unless you overlevel him with a fast mon, and it hits hard. Elesa is also hard if you don't have a high-level Sandile, Dwebble, or Boldore.I have played red, ruby, platinum and black they have all been fun and i have liked them all
Red, you could say it was easy getting your starter to a high level and catching zapdos and a dugtrio then sweep the e4, but that isnt fun. Fun is how you make the game, if you go competitive and care about evs, then that isnt fun. If you soft reset or keep capturing pokemon for natures, that isnt fun. If you look up the new game mons, before you play, it isnt fun. Fun is how you make the game.
The only game i found a bit easy was black, the e4 wasnt challenging 4 pokes all at 48, a bit easy. Ghetsis's infamous hydreigon wasnt a problem as i had a samarott with megahorn and i was lucky to get a jolly scolipede, also with megahorn. That game, i didnt know about physical or special, and it was a bit hard. I didnt know what to do after, so i never bothered.
I have liked all the plots, red didnt include the legandaries, but that was arguably the best game, imo. I remember hearing the rumour about mew and then doing it and it was so cool. Also with the regi's, i randomly went to the cave, complete coincidence, and i had to try to find a way to crack the code. I eventually found out it was braile. That was very fun and one of my favourite parts.
I dont think there is a problem, im starting an y playthrough, and im loving the graphics.
I finished my Black Nuzlocke a while ago with only one mon left. I pulled out of Lenora with 2 living mons and I beat Cress only with a lucky crit.