I'm 67 episodes into the series, and it rates a solid 7/10 for me so far. The main story develops at a slow pace, but it does steadily develop and climax with beautifully animated battles and emotionally-touching interactions. Some of the episodes drag on too long or focus on side-stories that aren't very interesting, but it all adds up in the end. However, I understand the criticisms about the story.
I don't understand much of the other criticisms though. Some complain that Boruto doesn't embody the same spirit as Naruto, while others complain that it's too similar. Without giving spoilers, the story that's told is one where the older generation of ninja deal with protecting a world at peace, and the younger generation try to live up to their parents despite maturing in a very different environment. Each character, old and young, grapples with the path they choose to follow. In this way, it is very similar to the original series. And yes, a lot of the old jutsus are passed down, but there are also improvements and totally new ones. In a lot of ways it feels like a continuation of Naruto, but in other ways it is a completely different show, and I think that has some people confused.
If you want Naruto 2.0, Boruto isn't it. If you want a completely new experience, Boruto isn't it either. If you go into the show without expecting it to be one way or the other, you may enjoy its carefully-crafted story like I have.