As seems to be the unfortunate norm, this series got worse with every new season.
First one was amazing. It felt fresh. It was a fairy-tale, that was grounded, no magic, could be serious and somewhat deep, when it mattered. It looked really good, pacing was great, world-building was interesting enough to make you want more.
Second season diverged quite a bit, especially since it now not so much of a "travelling show", most of the season was happening in just a few places. It made total sense from narrative perspective, and it was still working on building the world, even though the pacing became worse, and overall it became a bit more predictable.
Third season is mostly a rushed mess, though. It's too flat and one-dimensional, it's too... Childish? Yes, it's not like people started throwing fireballs or anything, but it felt like the core of the story became magical, which made little to no sense to me and felt like a way to quickly wrap up the show rather than make a good story.
So, my recommendation is to watch 1st season, maybe 2nd one, but skip the 3rd one.