With this show I learned a lesson about life and about storytelling: questions are more interesting than answers.
While I think the first half of the show is better than the second half (season 3 being the best one), I think most of the criticism is unfounded and often comes from people not understanding or simply not liking the outcome of things. I'd say 95% of the questions in the show were answered, and almost all making perfect sense. In fact, I would have preferred in retrospect that less things had been answered, and had been left to the viewers imagination in some more subtle ways.
In any case, it's the best "entertainment" TV show ever IMO, and really worth watching in 2020.