the first time a tried W2 i couldnt even pass the first couple enemies in the introduction area, i kept dying and dying because i tried to faceroll my way on them, then i started to use singns block and roll and payed more attention to my stamina and passed them just fine
not even once i was forced to explore the combat mechanic in W3, you can finish the game literally spamming X and its very unsatisfying and unrewarding , but if only the sword combat felt good, it would be ok, but it doesnt, sword fight feel like a pillow fight , even W2 felt better
Difficulty wise, no question. And it's been something CDPR received CRAPLOADS of complaints with TW2. My understanding (pardon me if I'm wrong) is that you discovered The Witcher with the 3rd one, so I assume you only played TW2 Enhanced Edition, which already nerfed the prologue. The difficulty curve was very high, no argument there.
However, where I'd argue there is that TW2 combat system was easily abused. Once you understand a straight sword attack is not going to work on most human enemies, and that you understand than parry is tactically a bad choice (because of its stamina cost and, with EE, the damage you take anyway), and that roll technically solves most of your problems (no stamina cost, allows you to backstab ennemies, to avoid dangerous situations), the only thing left to learn is to plan where you will roll (especially prior to improving your skills to receive less damage from attacks from be back).
Unarguably though, higher stamina pool meant signs matter more. Quen dangerous effects of blocking any stamina regen meant that you couldn't abuse it, like you can in TW3.
Unfortunately, as many people complained about the difficulty of TW2 combat system, especially in its original edition, I'd assume developers chose a different path for TW3, which was to mainstream it. Give the player the feeling of overpowered-ness. I can't say the game was particularly easy to me the first hours, but it was night and day compared to TW2. Unfortunately, Difficulty level didn't fix it. I had hoped Death March would provide a challenge, It did for 10 levels, then stopped.
But I'm not arguing difficulty there, I'm arguing mechanics and gameplay. TW3 combat system feels richer to me. Basic moves to start with has been enriched by a Dodge. Parry is useful but depends of the monster you fight. Roll is no longer the king of defense. Horde Monsters, Solo Monsters, Flying Monsters. You don't fight a pack of wolves like you fight a Griffin, nor do you fight 3 peasants like you fight a group of archer, lancer, and shielded enemy. Some monsters will acquire a spectral form, and some will swarm you. Yes, the relative low difficulty makes a few of those things less relevant than they should be. I'm lucky enough to play on PC so can mod the game to alter this.
When it comes to the sound and feel of the sword, TW2 is far but I could indeed remember more inertia feeling in the blade. But really, nothing that stroke me while playing TW3.
All of this imo commends respect for this combat system. Sure, maybe it's not perfect, and if we had a TW3 EE or a TW4, there would be a lot of things I could ask CDPR to improve. But I really do not think that there is nothing there. I could of course exaggerate, and state that I could play the whole game spamming X (which I won't because it's not true), but the truth is that CDPR tried hard to improve the combat compared to TW2, and did a pretty good job at it if you ask me. I surely enjoyed combat in TW3, and many of my complaints with TW2 combat system were gone, even though new came unfortunately.