Yeah, the art really is bad. Not just in terms of taste, but objectively too (faces look similar, impossible to distinguish. Hair too. Mc literally is only one who got black hair because otherwise there would be no way to know when we got mc on-screen vs a side-char; lots of details drawn in the bg's, like decorative reliefs carved into the wood. Making it much more cluttered. And often it is not even detailed everywhere, making it a mess where large parts have the details fade out etc; tons of panels have little to do with what's actually happening, only serving as a backdrop for dialogue. So we get useless images like a random shot of undeads; finally, it feels a bit like scales changes constantly, and overall perspective is off a bit quite often (like that horse where a trailing stick has somehow bounced ahead of the horse's backlegs and seems to be about to (near-?)hit the rider).
Anyone that claims otherwise does not realize they are reading a manga, and are instead trying to review each panel in a vacuum (Yes. The panels are artsy - aka detailed and aims to portray realistic human features. That is the problem).
And like you said, there are way too much detailed/cluttered plot that is heavily dependent on names (characters, countries, places, etc). So the release-frequency really doesn't work (we always forgot what it is about - in terms of plot-details - by the time next chapter comes out).