First major issue. Lot of reviews are about that this show cannot decide, if this is a proper fantasy for adults or teenage romance drama. I agree and add one thing to this idea, that balance between this two formats is weird and for me, as more demanding viewer, dumb. Add 2 stars if you are casual viewer.
Second major issue is a lore of that world. You start watching it like: " there will be some paralel between legend of king Arthur and Excalibur sword". And that is mistake. Only the names are similar. I like historical accuracy, but this is about something else and it should be mentioned for example in first 5 min of show.
Third major issue is "Netflix pattern" for this shows. So rebel teen got power, fighting against parents, want to run, then "unexpected" twist, ... :D So this is hard to watch again and again and again.
Dialogues and script. I have feeling that i have seen and heard it already in others fantasy shows or movies. So unoriginal. Acting is sometimes bad, sometimes good. Fighting choreography is ... is there at least :D
In general, good show for summer. With tons of blood in there not for kids, with weak plot and dialogues and lot of teen drama not for adults.