It was the opposite for me. The first episode was great, 2-3 were fine/good, and then it was just downhill from there. Overall, I didn’t like the first season (iirc, my final score for the season was 4/10).
I’d still check out a season 2, but maybe not 3+ unless 2 really improves things.
I can see where the praise comes from though, I’m just adding my opinion as a reminder that it isn’t universally praised.
I was thinking Urotsukidoji: Legend of the Overfiend.
But there are, for whatever reason, so many possibilities for what it could’ve been (including the mostly live action Demonlover)