I'm even later to the party, but finally got to Season 2 and was pretty disappointed. For context, I haven't read the books or played anything but the first game (which the series doesn't seem to draw much from).
I mostly liked the first two episodes, but I slowly lost my interest starting with Episode 3 and was really bored by the last few episodes. The main thing is that the season felt like it was more about Ciri and Yennefer than the character that the series is named after. The story revolved around them and they had all of the character development while Geralt was almost a bystander. He had half a dozen brief action scenes, but, otherwise, just stood around and pouted. I couldn't figure out what his problem was half the time, either. For example, he chose to protect Ciri, yet acted like she was a burden or something.
The overall story didn't interest me. I didn't care what Ciri wanted to be or what she would be. A coming of age drama isn't really what I was after. She looked silly training to be a 5-foot witcher before dropping it like it was just a phase in order to pursue magic. The elf/human tension was somewhat interesting, but there was far too much of it for it to amount to as little as it did. Even the climactic reveal fell totally flat with me, and I'm seemingly one of the few to whom that was supposed to be a surprise. Also, there was hardly any adventure. Most of the season took place indoors at a few different locations and, when they needed to travel between them, they either literally teleported or may as well have because it took no time to arrive. Small world. The sets did look really nice and they got their money's worth out of them, but I also got tired of them, particularly Kaer Morhen, which would've been fine as a major location for an episode or two, but not five or six. Lastly, this is the least of my issues, but I found all of the modern swearing jarring. It felt out of place and like lazy writing.
Anyways, I wouldn't say that I hated it, but I certainly lost interest in it as it went along and ended up pretty disappointed. I didn't even have high expectations. I just hoped to enjoy it like Season 1, especially after the last three seasons that I watched (Wheel of Time, The Expanse S6 and The Book of Boba Fett) were all disappointing. There's been a lot of content put out recently that's fallen rather short of its potential, IMO.