On one hand, the visual design of the characters (obviously by the mangaka) is sublime - the costumes and overall aesthetics of the them are a couple notches above an average shounen title. This is also coupled by the choreographics of fighting scenes, as canonically most if not all "breathing" moves are inspired by natural phenomena - and as such their visuals are followed by bright and vibrant overlays of what I understand as their representations. Add in ufotable as the studio which is handling the animation of all such scenes and you get a seriously stunning animation.
On the other hand, the series is constantly dealing with narrative constipation. The characters are shallow beyond belief - if you'd ever complained about a shounen title's lack of depth and poise in its narrative, you'll be surprised how much better they will seem in contrast to the slop you're served with... this. Every character in this series is built plainly upon a single quirk, with absolutely no development into their personalities. They will always have one-dimensional responses to anything they experience to a comical extent.
If you are reading this, it's highly likely that this kind of a review isn't new for you as you've watched the other seasons as well. However, it just gets worse with this season. 5 episodes in, what we get is a highly elevated visual feast accompanied by a bland, soulless development of a story which could be worded by a character in less than perhaps a minute per episode in full detail. I'm not expecting anything better into the season in this regard. What keeps me watching is just the absurdly good audiovisual quality. What makes me nauseous on the other hand is Tanjiro growing ever shallower, accompanied by the very existence of Mitsuri whose existence is just comedic at this point (just why)
