OK, I Just finished Season 3 yesterday and it's good. You have to employ a willing suspension of disbelief and go along for the ride--it's not Law & Order; no, if you're prone to detailed over analysis, not everything will line up seamlessly, and yes, there may be plot gaps but suspend your disbelief and it will be fine. More than fine even.
Sabrina is a particular kind of plucky heroine, sort of like Nancy Drew, that practically everyone loves (though not an It-girl, she is endlessly beloved by loads), plays up her unique strengths incessantly and like the famous girl sleuth, she nearly always wins, except for when she doesn't, and it's quite satisfying when the script writer/s deliver those turns and she has to fight her way out to her storied ending. Everything doesn't always fall into her lap, especially after season 1--praise Lilith, 'cause she was starting to make my eyes roll and was insufferable. But I also reminded myself she is 16 and not always making the best judgment calls (as did I at that age), so go figure.
And there's queer identities and relationships! And same and multiple gender/demon loving and lust. Aaaand there's black and PoC witches and warlocks! If you're a black person who was wondering about any of that, I'm here to tell ya, it's there and it's fantastic. (And if that's not important to YOU, then fine, cool. There are folks for whom that is refreshing and necessary.) Especially the show's treatment of traditional African Diaspora spirituality in season 3 (again, not meant to be supremely authentic and is a mishmash and her Haitian accent is off) was refreshing and surprising and stands up well alongside the western witch coven on its own strengths, worth and heritage.
If you're carrying years of Catholic school and learning from small, sights of inverted crosses and a goat-headed Satan can be jarring too, maybe; not because any of it is dangerous to consume but you might just be confronted with some deep-seated indoctrination of imagery and symbols (quite distinct from your own spirituality, btw) that you have and recognize that it's there, that's all. All in all, a rollicking journey and Sabrina, blissfully, gets less annoying. *rooting for a reformed Church of Night & the Spellman fam*