Uhhhh...ok.....let's just ignore how much of a game design masterpiece Super Metroid is and concentrate entirely on arbitrary factors that we decided make the game retroactively bad. Seems legit.
Eherm, OT I basicaly agree with OP that it is easier than the original Metroid (haven't played 2), mostly as consequence of improved game design. I got hopelessly lost in the original Metroid because most of the areas look very similar due to harware limitations. As far as I remember gameplay is also much less refined and as a consequence much less fun. My reaction to the original was decidedly 'meh', while I loved Super Metroid which I played afterwards.
A game with slippery badly implemented controls will be hard, yes, but for all the wrong reasons. Accusing Super Metroid of handholding because it wordlessly teaches you about it's world and how to interact with it is ridiculous imo.
I'd rate it's difficulty medium, at least if you go through it without sequence breaking. It's challenging without being frustrating. Also most of it's difficulty isn't supposed to come from combat anyways, but from exploration and puzzle solving, It's very well balanced in that regard imo.







